Explanation:

1. Correct Answer: Option 1 - "are bought and sold"

   The sentence requires a passive verb form in the simple present tense. The simple present tense is used to describe habitual actions or general truths. In this context, the sentence describes a regular activity that occurs every Sunday. Therefore, the correct passive form is "are bought and sold," which indicates that the action of buying and selling second-hand books happens regularly on the pavement every Sunday. The use of "are" aligns with the plural subject "books," making this option grammatically correct and contextually appropriate.

2. Explanation of Incorrect Options:

   • Option 2 - "were bought and sold": This option uses the past tense, which indicates actions that happened in the past. However, the sentence describes an ongoing, habitual action that occurs every Sunday, not something that happened in the past. Therefore, this option is incorrect for the context of the sentence.

   • Option 3 - "had been bought and sold": This option uses the past perfect tense, which is used to describe actions that were completed before another action in the past. The sentence does not indicate any sequence of past events; instead, it describes a regular activity. Thus, this option is not suitable for the sentence.

   • Option 4 - "will be bought and sold": This option uses the future tense, which indicates actions that will happen in the future. The sentence, however, refers to a current, ongoing activity that takes place every Sunday, not something that is planned for the future. Therefore, this option does not fit the context of the sentence.

In conclusion, Option 1, "are bought and sold," is the correct choice because it accurately reflects the habitual nature of the action in the simple present tense, aligning with the context of the sentence.

The sentence "How beautiful those hills are!" is an example of an exclamatory sentence. Let's explore why Option 2 is the correct choice and why the other options are incorrect.

1. Explanation for Option 2 (Exclamatory sentence):

   • An exclamatory sentence is used to express strong emotion or excitement. It often begins with words like "how" or "what" and ends with an exclamation mark. In this sentence, the speaker is expressing admiration and wonder at the beauty of the hills, which is a strong emotional response. The use of the exclamation mark at the end further emphasizes the exclamatory nature of the sentence. Therefore, Option 2 is the correct answer.

2. Why Option 1 (Imperative sentence) is incorrect:

   • An imperative sentence is used to give a command, make a request, or offer advice. It typically starts with a verb and does not usually include a subject. For example, "Look at those hills" is an imperative sentence. The given sentence does not instruct or command anyone to do anything; instead, it expresses an emotion, which is why it is not an imperative sentence.

3. Why Option 3 (Interrogative sentence) is incorrect:

   • An interrogative sentence is used to ask a question and typically ends with a question mark. It often begins with words like "who," "what," "where," "when," "why," or "how." Although the sentence starts with "how," it does not pose a question but rather expresses an emotion. Therefore, it is not an interrogative sentence.

4. Why Option 4 (Rhetorical question) is incorrect:

   • A rhetorical question is a question asked to make a point rather than to elicit an answer. It often implies its own answer or is used for persuasive effect. The given sentence is not structured as a question and does not seek to make a point through a question format. Instead, it directly expresses admiration, making it an exclamatory sentence rather than a rhetorical question.

In conclusion, the sentence "How beautiful those hills are!" is best categorized as an exclamatory sentence due to its expression of strong emotion and the use of an exclamation mark, which aligns perfectly with the characteristics of Option 2.

The underlined words "who is wearing a red ribbon" in the sentence "The girl \underline{\text{who is wearing a red ribbon}} is my sister." form an adjective clause. Here is a detailed explanation supporting why Option 2 is correct and why the other options are incorrect:

1. Explanation for Option 2 (Adjective Clause):

   • An adjective clause is a dependent clause that functions as an adjective, meaning it modifies a noun or pronoun. In this sentence, the clause "who is wearing a red ribbon" provides additional information about the noun "girl." It describes or specifies which girl is being referred to, thus functioning as an adjective. The clause begins with the relative pronoun "who," which is commonly used to introduce adjective clauses. Therefore, the underlined words are correctly identified as an adjective clause.

2. Explanation for why Option 1 (Noun Clause) is incorrect:

   • A noun clause functions as a noun within a sentence. It can act as a subject, object, or complement. In this case, the underlined words do not serve as a noun or take on any noun roles. Instead, they describe the noun "girl," which is characteristic of an adjective clause, not a noun clause.

3. Explanation for why Option 3 (Adverb Clause) is incorrect:

   • An adverb clause modifies a verb, adjective, or another adverb, providing information about time, place, condition, contrast, etc. The underlined words do not modify the verb or provide such information. Instead, they specifically describe the noun "girl," which is not the function of an adverb clause.

4. Explanation for why Option 4 (None of the above) is incorrect:

   • The underlined words clearly fit the definition of an adjective clause, as they provide descriptive information about the noun "girl." Since they do not fit the criteria for a noun clause or an adverb clause, and they do indeed form a recognized grammatical structure, Option 4 is incorrect.

In conclusion, the underlined words "who is wearing a red ribbon" are an adjective clause because they modify the noun "girl" by providing additional descriptive information. This supports Option 2 as the correct answer.

Option 2 is the correct answer because it accurately matches each type of clause with the appropriate sentence. Let's break down each match to understand why this option is correct:

(a) Adjectival clause : (ii) That is the man who taught me lessons in science.

• An adjectival clause functions as an adjective, providing more information about a noun. In sentence (ii), "who taught me lessons in science" is an adjectival clause that describes "the man."

(b) Adverbial clause of time : (iii) Wait here till I come back.

• An adverbial clause of time indicates when something happens. In sentence (iii), "till I come back" specifies the time frame for the action "wait here."

(c) Adverbial clause of reason : (iv) He will win the election because he is very popular.

• An adverbial clause of reason explains why something happens. In sentence (iv), "because he is very popular" provides the reason for the prediction "he will win the election."

(d) Adverbial clause of comparison : (i) He speaks much better than he writes.

• An adverbial clause of comparison compares two actions or qualities. In sentence (i), "than he writes" compares the manner of speaking to writing.

Now, let's explain why the other options are incorrect:

Option 1: (a)(i); (b)(ii); (c)(iii); (d)(iv)

• This option incorrectly matches the clauses. For example, (a)(i) pairs an adjectival clause with a sentence that contains a comparison, which is incorrect.

Option 3: (a)(iv); (b)(iii); (c)(ii); (d)(i)

• This option also mismatches the clauses. For instance, (a)(iv) pairs an adjectival clause with a sentence that contains a reason, which is incorrect.

Option 4: (a)(iii); (b)(ii); (c)(i); (d)(iv)

• This option incorrectly matches the clauses as well. For example, (a)(iii) pairs an adjectival clause with a sentence that contains a time clause, which is incorrect.

In conclusion, Option 2 is the only option that correctly matches each type of clause with the appropriate sentence, making it the correct answer.

To determine which option becomes a noun when the suffix 'ment' is added, we need to understand how the suffix 'ment' functions in English. The suffix 'ment' is used to form nouns indicating an action or resulting state (a noun of action or a noun of result). Let's analyze each option:

1. Amuse: When we add the suffix 'ment' to "amuse," it becomes "amusement." "Amusement" is a noun that refers to the state of being amused or entertained. This transformation is consistent with the function of the suffix 'ment,' which turns verbs into nouns that describe an action or state. Therefore, "amusement" is a valid noun formed by adding 'ment' to "amuse," making Option 1 correct.

2. Extort: Adding 'ment' to "extort" would form "extortment." However, "extortment" is not a recognized word in English. The correct noun form of "extort" is "extortion," which does not use the suffix 'ment.' Therefore, Option 2 is incorrect.

3. Correct: Adding 'ment' to "correct" would form "correctment." However, "correctment" is not a recognized word in English. The correct noun form of "correct" is "correction," which does not use the suffix 'ment.' Therefore, Option 3 is incorrect.

4. Colour: Adding 'ment' to "colour" would form "colourment." However, "colourment" is not a recognized word in English. "Colour" is already a noun, and adding 'ment' does not create a valid noun form. Therefore, Option 4 is incorrect.

In conclusion, Option 1 is the correct answer because "amuse" becomes "amusement" when the suffix 'ment' is added, forming a valid noun that describes the state of being amused. The other options do not form recognized nouns with the addition of 'ment,' which supports the correctness of Option 1.

Explanation:

1. Option 2: Energy

   • The word "Energy" does not have a prefix. A prefix is a group of letters added to the beginning of a word to change its meaning. In "Energy," there is no such addition; the word stands alone without any prefix. It is a base word that refers to the capacity for doing work or the power derived from physical or chemical resources.

2. Option 1: Encourage

   • The word "Encourage" contains the prefix "en-." The prefix "en-" is used to form verbs that mean to cause a person or thing to be in a particular state or to engage in a particular activity. In this case, "en-" is added to "courage" to mean to give support, confidence, or hope to someone.

3. Option 3: Ericlose

   • The word "Ericlose" appears to be a typographical error or a non-standard word. However, if we consider it as a variation of "enclose," it contains the prefix "en-," which means to surround or close in. Therefore, it has a prefix.

4. Option 4: Endanger

   • The word "Endanger" contains the prefix "en-." The prefix "en-" is used here to mean to put in danger or to expose to harm. Thus, "endanger" is formed by adding the prefix "en-" to the base word "danger."

In conclusion, Option 2, "Energy," is the correct answer because it is the only word among the options that does not have a prefix. The other options all contain the prefix "en-," which alters the meaning of their respective base words.

The correct word for the expression "One who is present everywhere" is "Omnipresent," which corresponds to Option 3. Here's a detailed explanation justifying why Option 3 is correct and why the other options are incorrect:

1. Omnipresent (Option 3): The term "omnipresent" is derived from the Latin words "omni," meaning "all," and "praesens," meaning "present." It is used to describe a being or entity that is present in all places at all times. This concept is often associated with divine or supernatural beings, such as deities in various religious contexts, who are believed to have the ability to be everywhere simultaneously. Therefore, "omnipresent" is the correct word for someone or something that is present everywhere.

2. Omnipotent (Option 1): The word "omnipotent" comes from the Latin "omni," meaning "all," and "potens," meaning "powerful." It refers to an entity that has unlimited power or authority. While it shares the prefix "omni" with "omnipresent," it specifically relates to power rather than presence. Therefore, "omnipotent" is not the correct term for someone who is present everywhere.

3. Omniscient (Option 2): "Omniscient" is derived from the Latin "omni," meaning "all," and "scientia," meaning "knowledge." It describes a being that possesses complete or unlimited knowledge, awareness, or understanding. This term is often used in theological contexts to describe a deity that knows everything. However, it does not relate to being present everywhere, making it an incorrect choice for the given expression.

4. Omnission (Option 4): The term "omnission" is not a standard English word and does not have a recognized definition in the context of being present everywhere. It appears to be a misspelling or a non-existent term, and thus, it is not applicable to the expression in question.

In summary, "omnipresent" is the correct term for describing someone who is present everywhere, as it directly relates to the concept of universal presence. The other options, while related to different attributes of power, knowledge, or being non-existent, do not accurately capture the essence of being present in all places at all times.

An oasis is the correct term for a green patch with fresh water and green trees in the middle of a vast desert. Here is a detailed explanation justifying why Option 1 is correct and why the other options are incorrect:

1. Why Option 1 is Correct (An Oasis):

   • An oasis is a fertile area in a desert or semi-desert environment, typically having a source of fresh water, such as a spring or a well. This water source allows vegetation to grow, creating a green patch amidst the arid surroundings. Oases are crucial for survival in deserts as they provide water and shade, making them vital rest stops for travelers and wildlife. The presence of fresh water and green trees is characteristic of an oasis, making it the correct term for the described scenario.

2. Why Option 2 is Incorrect (An Island):

   • An island is a piece of land surrounded by water, typically found in oceans, seas, lakes, or rivers. It is not associated with deserts and does not describe a green patch within a desert. Islands are not characterized by the presence of fresh water and vegetation in a desert setting, which is why this option is incorrect.

3. Why Option 3 is Incorrect (A Sand-Dune):

   • A sand-dune is a hill or ridge of sand piled up by the wind, commonly found in deserts. Sand-dunes do not contain fresh water or vegetation; they are simply accumulations of sand. Therefore, a sand-dune does not fit the description of a green patch with fresh water and trees, making this option incorrect.

4. Why Option 4 is Incorrect (A Mound):

   • A mound is a general term for a raised area of earth or debris. While mounds can occur in various environments, they do not specifically refer to a fertile area with fresh water and vegetation in a desert. Mounds lack the defining characteristics of an oasis, such as the presence of water and greenery, which is why this option is incorrect.

In conclusion, the term "oasis" accurately describes a green patch with fresh water and green trees in the middle of a vast desert, making Option 1 the correct choice.

Option 2, "Apartheid," is the correct answer for the question regarding a system of racial domination against dark-skinned people practiced by the seat of white supremacy. Here's a detailed explanation:

1. Explanation for Option 2 (Apartheid):

   • Apartheid was a policy and system of segregation or discrimination on grounds of race, which was implemented in South Africa from 1948 until the early 1990s. It was characterized by an institutionalized system of racial segregation and discrimination against the non-white population, particularly targeting black South Africans. The government, led by the white minority, enforced laws that separated people based on race, restricted the rights of the majority black inhabitants, and maintained white supremacy. This system was internationally recognized as a form of racial domination and oppression, making "Apartheid" the correct term for the described system.

2. Explanation for why other options are incorrect:

   • Option 1 (Colonialism): Colonialism refers to the practice of acquiring and maintaining colonies or territories by a foreign power, often involving the exploitation of resources and people. While colonialism can involve racial domination, it is not specifically defined as a system of racial segregation and discrimination like apartheid. Colonialism is broader and not limited to racial issues alone.

   • Option 3 (Atheism): Atheism is the lack of belief in the existence of deities. It is a philosophical or religious stance and has no relation to racial domination or systems of racial segregation. Therefore, it is not applicable to the context of racial domination described in the question.

   • Option 4 (Autocracy): Autocracy is a system of government in which one person possesses unlimited power. While an autocratic regime can enforce discriminatory policies, autocracy itself is not inherently related to racial issues or the specific system of racial segregation and discrimination that apartheid represents.

In conclusion, "Apartheid" is the correct term for the system of racial domination described in the question, as it specifically refers to the institutionalized racial segregation and discrimination practiced in South Africa under white supremacy.

The phrasal verb "figure out" is commonly used in English to mean "comprehend" or "understand." When someone is trying to "figure out" something, they are attempting to make sense of it or grasp its meaning. In the context of the sentence, "She could not figure out the theme of the play clearly," it indicates that she was unable to comprehend or understand the theme of the play.

1. Explanation for Option 1 (Comprehend):

   • The phrase "figure out" aligns closely with the meaning of "comprehend." When someone is trying to figure something out, they are working to understand or make sense of it. In this context, the sentence suggests that she was unable to comprehend the theme of the play, which is why Option 1 is the correct choice.

2. Explanation for why other options are incorrect:

   • Option 2 (Examine): While "examine" means to inspect or look at something closely, it does not capture the essence of understanding or making sense of something. "Figure out" implies a mental process of understanding, rather than just looking at or analyzing something.
   • Option 3 (Enjoy): "Enjoy" refers to taking pleasure in something, which is unrelated to the process of understanding or comprehending. One can enjoy something without fully understanding it, and vice versa. Therefore, "figure out" does not mean "enjoy."
   • Option 4 (Draw): "Draw" typically means to create a picture or to pull something towards oneself. It does not relate to the process of understanding or comprehending information. Thus, "figure out" does not mean "draw."

In summary, the phrasal verb "figure out" is best understood as "comprehend," which is why Option 1 is the correct answer. The other options do not accurately capture the meaning of "figure out" in the context of understanding the theme of a play.

1. Explanation for Option 1: "to decline"

The phrasal verb "falls off" is commonly used to describe a decrease or reduction in quantity, intensity, or quality. In the context of the sentence "Business falls off during summer months," it implies that there is a reduction in business activity or sales during this period. This usage aligns with the definition of "to decline," which means to become smaller, fewer, or less; decrease. Therefore, Option 1 is the correct interpretation of the phrasal verb "falls off" in this context.

2. Explanation for why the other options are incorrect:

• Option 2: "to grow"
  The phrase "to grow" suggests an increase or expansion in size, number, or intensity. This is the opposite of what "falls off" conveys. Since "falls off" indicates a reduction, it cannot mean "to grow." Therefore, Option 2 is incorrect.

• Option 3: "to increase"
  Similar to Option 2, "to increase" means to become larger or greater in size, amount, or degree. This is contrary to the meaning of "falls off," which signifies a decrease. Hence, Option 3 is incorrect.

• Option 4: "to disappear"
  While "to disappear" implies a complete vanishing or ceasing to be visible or present, "falls off" does not suggest a total disappearance but rather a reduction or decline. Therefore, Option 4 does not accurately capture the meaning of "falls off" and is incorrect.

In conclusion, the phrasal verb "falls off" in the context of the sentence clearly aligns with the meaning of "to decline," making Option 1 the correct choice.

"Street smart" refers to someone who is adept at handling practical situations and challenges in everyday life, often through experience and intuition rather than formal education. This aligns with Option 4: "One who becomes smart by doing things independently or by choice rather than force." Here’s why this option is correct and why the others are not:

1. Explanation for Option 4:

   • Being "street smart" involves having the ability to navigate complex social environments, make quick decisions, and solve problems using practical knowledge. This type of intelligence is often acquired through real-world experiences and personal initiative, rather than through structured learning or compulsion. It emphasizes adaptability, resourcefulness, and the ability to think on one's feet, which are characteristics of someone who learns independently and by choice.

2. Why Option 1 is incorrect:

   • Option 1 describes someone who has nightmares about learning, which implies a negative or fearful attitude towards learning. This does not relate to being "street smart," as the term does not involve fear or anxiety about learning but rather the ability to learn from life experiences and apply that knowledge effectively.

3. Why Option 2 is incorrect:

   • Option 2 refers to someone who is smart at learning course material, which suggests academic intelligence or book smarts. "Street smart" is distinct from academic intelligence; it focuses on practical, real-world knowledge and skills rather than theoretical or classroom-based learning.

4. Why Option 3 is incorrect:

   • Option 3 describes someone who is smart at learning languages. While language learning is a valuable skill, it is not specifically related to being "street smart." Street smarts involve a broader set of skills related to navigating and understanding the complexities of everyday life, which goes beyond linguistic abilities.

In summary, Option 4 is the correct answer because it captures the essence of being "street smart" as someone who gains intelligence and skills through independent actions and choices, reflecting practical and experiential learning.

Option 2 is the correct answer because it arranges the phrases in a logical and grammatically correct order to form a coherent sentence. Let's break down the sentence:

1. "Stop" - This is the imperative verb that begins the sentence, instructing someone to cease an action.

2. "beating about" - This phrase is part of the idiom "beating about the bush," which means avoiding the main topic or not getting to the point.

3. "the bush" - Completes the idiom "beating about the bush."

4. "and tell me" - This conjunction and phrase connect the two actions, indicating that after stopping the first action, the person should proceed to the next action, which is telling.

5. "what you want" - This phrase specifies the information that the speaker is requesting.

The sentence "Stop beating about the bush and tell me what you want" is a clear and direct instruction, making it the correct and meaningful sentence.

Now, let's explain why the other options are incorrect:

1. Option 1: "Stop/and tell me/beating about/what you want/the bush?"

   • This arrangement is incorrect because it disrupts the idiom "beating about the bush" by separating "beating about" and "the bush," making the sentence nonsensical.

2. Option 3: "What you want/the bush/and tell me/stop/beating about?"

   • This option starts with "What you want," which is not a proper way to begin the sentence. Additionally, it separates the idiom and places the phrases in an illogical order, resulting in a confusing and grammatically incorrect sentence.

3. Option 4: "Stop/and tell me/what you want/beating about/the bush?"

   • This option incorrectly places "beating about" and "the bush" at the end, disrupting the idiom and making the sentence grammatically incorrect and unclear.

In conclusion, Option 2 is the only option that arranges the phrases in a logical, grammatically correct order to form a meaningful sentence.

"The summit of the mind" is a metaphorical expression that suggests reaching a peak or high point in one's mental or emotional state. Let's explore why Option 2, "an inspiration to face life's obstacles resolutely," is the correct interpretation of this phrase.

Explanation for Option 2:

1. Metaphorical Interpretation: The term "summit" often symbolizes the highest point or peak. In the context of the mind, it implies reaching a state of clarity, strength, or enlightenment. This aligns with the idea of being inspired to tackle challenges with determination.

2. Mental Resilience: Facing life's obstacles resolutely requires mental fortitude and inspiration. The "summit of the mind" suggests a mental state where one feels empowered and motivated to confront difficulties, embodying the essence of resilience and determination.

3. Positive Outlook: Inspiration is a positive force that drives individuals to overcome hurdles. The phrase implies a mental elevation that equips a person with the necessary mindset to handle life's adversities effectively.

Why Other Options are Incorrect:

1. Option 1 - A sense of victory and happiness: While reaching a summit can be associated with victory, the phrase "summit of the mind" emphasizes mental readiness and inspiration rather than the end result of happiness or victory. It focuses more on the process of facing challenges rather than the outcome.

2. Option 3 - A battle fought and won: This option implies a completed struggle, whereas "the summit of the mind" suggests an ongoing state of mental preparedness and inspiration to face challenges, not necessarily a concluded battle.

3. Option 4 - A sense of conquering the highest and the mightiest: This option focuses on the act of conquering, which is more about achieving dominance or control. The phrase "summit of the mind" is more about reaching a mental state that inspires and prepares one to face challenges, rather than the act of conquering itself.

In conclusion, Option 2 is the correct interpretation as it captures the essence of being mentally inspired and prepared to face life's obstacles with resolve and determination.

Option 1 is the correct answer for matching the idioms with their meanings. Let's break down each idiom and its corresponding meaning to understand why this option is correct:

(a) At the finger tips : (iii) to know thoroughly

• The idiom "at the fingertips" means having complete knowledge or mastery of something, as if it is readily accessible or easily retrievable, much like something you can easily reach with your fingers. Therefore, the correct match is (iii) to know thoroughly.

(b) Took the world by storm : (iv) to have a great and rapid success

• "Took the world by storm" refers to achieving sudden and widespread success or popularity. This idiom is used when someone or something becomes very successful quickly and impressively. Hence, the correct match is (iv) to have a great and rapid success.

(c) To nip something in the bud : (i) to destroy or stop something at an early stage of its development

• The idiom "to nip something in the bud" means to stop a problem or negative situation from developing by addressing it early. It is akin to cutting off a bud before it can grow into a flower, thus preventing further development. Therefore, the correct match is (i) to destroy or stop something at an early stage of its development.

(d) To turn over a new leaf : (ii) a sudden and wonderful change

• "To turn over a new leaf" means to start anew, often by changing one's behavior or attitude for the better. It signifies a positive transformation or a fresh start. Thus, the correct match is (ii) a sudden and wonderful change.

Now, let's explain why the other options are incorrect:

Option 2:

• (a)(i) is incorrect because "at the fingertips" does not mean to destroy or stop something at an early stage.
• (b)(ii) is incorrect because "took the world by storm" does not mean a sudden and wonderful change.
• (c)(iii) is incorrect because "to nip something in the bud" does not mean to know thoroughly.
• (d)(iv) is incorrect because "to turn over a new leaf" does not mean to have a great and rapid success.

Option 3:

• (a)(ii) is incorrect because "at the fingertips" does not mean a sudden and wonderful change.
• (b)(i) is incorrect because "took the world by storm" does not mean to destroy or stop something at an early stage.
• (c)(iv) is incorrect because "to nip something in the bud" does not mean to have a great and rapid success.
• (d)(iii) is incorrect because "to turn over a new leaf" does not mean to know thoroughly.

Option 4:

• (a)(iv) is incorrect because "at the fingertips" does not mean to have a great and rapid success.
• (b)(iii) is incorrect because "took the world by storm" does not mean to know thoroughly.
• (c)(ii) is incorrect because "to nip something in the bud" does not mean a sudden and wonderful change.
• (d)(i) is incorrect because "to turn over a new leaf" does not mean to destroy or stop something at an early stage.

Thus, Option 1 is the only correct choice, as it accurately matches each idiom with its appropriate meaning.

Option 2, "Collocations," is the correct answer for the question regarding words that 'go together' or 'Word friends.' Here's a detailed explanation:

1. Explanation for Option 2 (Collocations):

   • Collocations are combinations of words that frequently appear together in a language. These word pairings are often used by native speakers and sound 'natural' or 'correct' to them. For example, in English, we say "make a decision" rather than "do a decision." The words "make" and "decision" are collocates, meaning they commonly occur together. Collocations are essential for fluency and naturalness in language use, as they reflect the typical patterns of word usage.

2. Why Other Options are Incorrect:

   • Option 1 (Compound words):

     • Compound words are formed when two or more words are combined to create a new word with a specific meaning, such as "toothbrush" or "sunflower." While compound words involve words coming together, they do not necessarily reflect the natural pairing or habitual co-occurrence of words in the way collocations do. Compound words create a single entity with a distinct meaning, rather than a habitual word pairing.

   • Option 3 (Idioms):

     • Idioms are phrases or expressions with meanings that are not deducible from the individual words. For example, "kick the bucket" means to die, which is not directly related to the literal meanings of "kick" or "bucket." Idioms are fixed expressions with figurative meanings, whereas collocations are about the natural pairing of words based on usage patterns.

   • Option 4 (Phrasal Verbs):

     • Phrasal verbs are combinations of verbs with prepositions or adverbs that create a meaning different from the original verb, such as "give up" or "look after." While phrasal verbs involve word combinations, they are a specific grammatical construction rather than general word pairings based on frequency and natural usage, as seen in collocations.

In summary, collocations are the correct answer because they specifically refer to words that naturally and frequently occur together, reflecting common usage patterns in a language. This distinguishes them from compound words, idioms, and phrasal verbs, which involve different types of word combinations and meanings.

Option 3 is the correct answer because it matches each phrase with its corresponding expression in a way that makes sense and is commonly understood in English idioms. Let's break down each pairing:

(a) Save : (iv) for a rainy day

• This pairing is correct because the phrase "Save for a rainy day" is a well-known idiom that means to save money or resources for a time when they are needed, typically during an emergency or difficult situation.

(b) Don't cry : (i) over spilt milk

• This pairing is correct because "Don't cry over spilt milk" is a common idiom that advises not to worry about things that have already happened and cannot be changed.

(c) Make hay : (ii) while the sun shines

• This pairing is correct because "Make hay while the sun shines" is an idiom that means to take advantage of favorable conditions while they last.

(d) Don't put the cart : (iii) before the horse

• This pairing is correct because "Don't put the cart before the horse" is an idiom that means not to do things in the wrong order or sequence.

Now, let's explain why the other options are incorrect:

Option 1: (a)(i); (b)(ii); (c)(iii); (d)(iv)

• This option incorrectly pairs each phrase with an expression that does not make sense. For example, "Save over spilt milk" and "Don't cry while the sun shines" are not meaningful idioms.

Option 2: (a)(iv); (b)(iii); (c)(ii); (d)(i)

• This option also incorrectly pairs the phrases. "Don't cry before the horse" and "Make hay for a rainy day" do not form meaningful expressions.

Option 4: (a)(i); (b)(iii); (c)(ii); (d)(iv)

• This option incorrectly pairs the phrases as well. "Save over spilt milk" and "Don't cry before the horse" are not recognized idioms.

In conclusion, Option 3 is the only option that correctly matches each phrase with its corresponding expression to form meaningful and commonly understood idioms.

Option 2 is the correct answer because it contains a grammatical error in the construction of the conditional sentence. In English, conditional sentences are typically structured in a way that the verb tenses in the "if" clause and the main clause are consistent and logical. Let's analyze Option 2:

2. "If I see Tom, I had tell him the news."

Explanation:

• The sentence uses "If I see Tom," which is a present simple tense, indicating a future possibility or condition.
• The main clause "I had tell him the news" is incorrect because "had" is not the appropriate auxiliary verb to use with "tell" in this context. The correct form should be "I will tell him the news" to match the future possibility indicated by the "if" clause.

Now, let's explain why each of the other options is correct:

1. "If a king knew three things, he would never fail."

   • This sentence is a correct example of a second conditional, which is used to talk about hypothetical situations. The structure "If [past simple], [would + base verb]" is appropriate here.

2. "If she knows we have a cat, she will leave the house."

   • This sentence is a correct example of a first conditional, which is used for real and possible situations in the future. The structure "If [present simple], [will + base verb]" is appropriate here.

3. "If you spit on the road, you will be fined."

   • This sentence is another example of a first conditional. It correctly uses the structure "If [present simple], [will + base verb]" to describe a real and possible consequence in the future.

In summary, Option 2 is the incorrect conditional sentence due to the misuse of verb tense in the main clause, making it inconsistent with standard English grammar rules for conditional sentences.

The 'schools of the future' may not allow the children 'the fun' of having a real classroom in the schoolyard with real classmates and a human teacher, as indicated by Option 1. Here's a detailed explanation supporting this:

1. Justification for Option 1:

   • Human Interaction: A real classroom provides children with the opportunity to interact face-to-face with their peers and teachers. This interaction is crucial for developing social skills, empathy, and communication abilities. The presence of a human teacher allows for personalized attention and the ability to adapt teaching methods to suit individual student needs.
   • Physical Environment: The schoolyard and physical classroom offer a tangible learning environment where children can engage in hands-on activities, group projects, and physical education, which are essential for holistic development.
   • Emotional and Social Development: Being in a real classroom helps children form friendships and learn to work collaboratively, which are important aspects of emotional and social development.

2. Explanation for why other options are incorrect:

   • Option 2 (Virtual Classroom with Virtual Reality): While virtual reality can create immersive learning experiences, it lacks the genuine human interaction and spontaneity found in a real classroom. The absence of physical presence can limit the development of interpersonal skills.
   • Option 3 (Robotic Teacher): A robotic teacher, although advanced in technology, cannot replicate the emotional intelligence and adaptability of a human teacher. It may not effectively address the diverse emotional and educational needs of students.
   • Option 4 (Virtual Classroom with Books on Screen): Learning through screens can be isolating and may not provide the same level of engagement and motivation as a real classroom setting. It also reduces opportunities for physical activities and face-to-face social interactions.

In conclusion, while technology offers innovative educational tools, the 'fun' and developmental benefits of a real classroom with human interaction are irreplaceable, making Option 1 the correct answer.

Option 2 is the correct answer because Albert Einstein did not receive the Nobel Prize in literature in 1921. Instead, he was awarded the Nobel Prize in Physics in 1921 for his discovery of the photoelectric effect, which was a pivotal step in the development of quantum theory. This clearly indicates that the statement in Option 2 is not true, as it incorrectly attributes a Nobel Prize in literature to Einstein.

Now, let's examine why the other options are incorrect:

1. Option 1: "He published his general theory of relativity in 1915." This statement is true. Albert Einstein indeed published his general theory of relativity in 1915, which revolutionized the understanding of gravity and had profound implications for the field of physics.

2. Option 3: "He warned American President about the adverse effects of the atomic bomb." This statement is true. Einstein, along with physicist Leo Szilard, wrote a letter to President Franklin D. Roosevelt in 1939, warning about the potential development of atomic bombs by Nazi Germany and urging the United States to accelerate its own research. This letter eventually led to the establishment of the Manhattan Project.

3. Option 4: "He proposed the formation of a world government." This statement is true. Albert Einstein was an advocate for global peace and cooperation, and he did propose the idea of a world government as a means to prevent future wars and ensure global security.

In summary, Option 2 is the correct answer because it is the only statement that is factually incorrect regarding Albert Einstein's achievements and actions.