HTET परीक्षा - Level 1 PRT - भाषा 2 - अंग्रेज़ी

Explanation:

1. Justification for Option 4 ("best"):

   Sachin Tendulkar is widely regarded as one of the greatest batsmen in the history of cricket. He holds numerous records, including being the highest run-scorer in both Test and One-Day International (ODI) cricket. Tendulkar was the first player to score a double century in an ODI and has the most centuries in both Test and ODI formats. His exceptional skill, consistency, and longevity in the sport have earned him the title of the "best" batsman by many cricket experts and fans around the world. Therefore, the word "best" accurately describes his unparalleled achievements and status in the cricketing world.

2. Explanation for why other options are incorrect:

   • Option 1 ("good"): While "good" is a positive adjective, it significantly understates Tendulkar's accomplishments and impact on the game. Many players can be described as "good," but Tendulkar's records and influence elevate him far beyond this basic level.

   • Option 2 ("better"): The term "better" is comparative and suggests a comparison between two entities. It implies that Tendulkar is superior to another batsman, but it does not capture the absolute excellence and unmatched status that "best" conveys. Tendulkar's achievements place him at the pinnacle of cricket, not just above another player.

   • Option 3 ("much better"): Similar to "better," "much better" is also a comparative term, indicating a significant improvement over another entity. However, it still falls short of expressing the ultimate level of excellence that "best" signifies. Tendulkar's legacy and records are such that he is considered the benchmark for batting greatness, making "best" the most fitting descriptor.

In conclusion, Option 4 ("best") is the correct choice because it accurately reflects Sachin Tendulkar's extraordinary contributions and status as a legendary batsman in the world of cricket.

Option 1, "This knife is sharper than that one," is the correct comparative sentence for the given positive sentence, "This knife is not as sharp as that one." Here's why:

1. Explanation for Option 1:

   • The original sentence, "This knife is not as sharp as that one," implies that "that one" is sharper than "this knife." To convert this into a comparative sentence, we need to directly compare the sharpness of the two knives, indicating that "that one" is sharper. Option 1 achieves this by stating, "This knife is sharper than that one," which correctly reflects the intended comparison by using the comparative form "sharper."

2. Why Other Options are Incorrect:

   • Option 2: "This knife is sharper."

     • This sentence is incomplete for a comparative context because it does not specify what "this knife" is being compared to. It lacks the necessary comparison to "that one," making it an incorrect transformation of the original sentence.

   • Option 3: "That knife is sharpest of all."

     • This sentence uses the superlative form "sharpest," which is not appropriate for a direct comparison between two items. The original sentence only involves two knives, so a comparative form is needed, not a superlative. Additionally, "of all" introduces a broader comparison that is not present in the original sentence.

   • Option 4: "This knife is more sharper than that one."

     • This sentence is grammatically incorrect because "more sharper" is an incorrect comparative form. The correct comparative form is simply "sharper," as used in Option 1. The use of "more" with "sharper" is redundant and incorrect.

In conclusion, Option 1 is the correct choice because it accurately and grammatically transforms the original sentence into a comparative form, maintaining the intended meaning and comparison between the two knives.

The superlative degree of 'Far' is 'Farthest', which is correctly identified as Option 2. Here's a detailed explanation:

1. Why Option 2 is Correct:

   • In English grammar, adjectives have three degrees of comparison: positive, comparative, and superlative. The word 'far' is an adjective that describes distance. Its comparative form is 'farther', and its superlative form is 'farthest'. The superlative degree is used to describe the extreme or highest degree of the quality, which in this case is distance. Therefore, 'farthest' is the correct superlative form of 'far'.

2. Why the Other Options are Incorrect:

   • Option 1: Farther - 'Farther' is the comparative degree of 'far', not the superlative. It is used to compare distances between two entities, not to indicate the greatest distance among three or more.
   • Option 3: Most far - This is not a grammatically correct form in English. The word 'far' does not use 'most' to form its superlative degree. Instead, it follows the irregular pattern of 'farther' and 'farthest'.
   • Option 4: Most farther - This option is incorrect because 'farther' is already the comparative form, and adding 'most' does not create a valid superlative form. The correct superlative form is 'farthest'.

In conclusion, 'farthest' is the correct superlative degree of 'far', making Option 2 the right choice.

Option 1 is the correct answer because it arranges the adjectives in a logical and grammatically correct order based on the conventional sequence of adjectives in English. The order of adjectives typically follows the pattern: opinion, size, age, shape, color, origin, material, and purpose. In this sentence, the adjectives are arranged as follows:

1. Disgusting (opinion): This adjective expresses a subjective judgment about the jacket, indicating that it is unpleasant or offensive in appearance or quality.

2. Illfitting (size/condition): This adjective describes the fit or condition of the jacket, indicating that it does not fit well.

3. Plastic (material): This adjective describes the material from which the jacket is made.

For the bazaar, the adjectives are arranged as follows:

1. Busy (opinion): This adjective gives a subjective description of the bazaar, suggesting it is crowded or bustling.

2. Local (origin): This adjective indicates that the bazaar is from the local area.

3. Sunday (time): This adjective specifies the time or occasion when the bazaar takes place.

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

• Option 2: "Illfitting, disgusting, plastic, Sunday, local, busy" does not follow the conventional order of adjectives. "Illfitting" should not precede "disgusting" because opinion adjectives typically come before condition adjectives. Additionally, "Sunday" should not precede "local" and "busy" because time-related adjectives usually come after origin and opinion adjectives.

• Option 3: "Plastic, illfitting, disgusting, busy, Sunday, local" incorrectly places "plastic" before the opinion and condition adjectives, which disrupts the natural flow of description. Similarly, "Sunday" is placed before "local" and "busy," which is not the correct order.

• Option 4: "Local, plastic, illfitting, busy, disgusting, Sunday" incorrectly places "local" and "plastic" before the opinion and condition adjectives for the jacket. For the bazaar, "disgusting" should not come after "busy" as it is an opinion adjective and should precede the others.

In conclusion, Option 1 correctly follows the conventional order of adjectives, making it the appropriate choice for the sentence.

The correct option to fill in the blank is Option 2: "meanest." Here is a detailed explanation justifying why Option 2 is correct and why the other options are incorrect:

1. Explanation for Option 2 ("meanest"):

   • The sentence "You are ______ among criminals" implies a comparison among a group of people, specifically criminals. The word "meanest" is the superlative form of the adjective "mean," which is used to describe someone who is the most mean out of a group. In English, superlative adjectives are used when comparing more than two entities, indicating that one has the highest degree of a particular quality. Therefore, "meanest" correctly fits the context of the sentence, suggesting that the person is the most mean among all the criminals.

2. Explanation for why the other options are incorrect:

   • Option 1 ("meaner"): "Meaner" is the comparative form of the adjective "mean," used to compare two entities. Since the sentence involves a comparison among multiple criminals, the superlative form "meanest" is more appropriate than the comparative form "meaner."
   • Option 3 ("meanly"): "Meanly" is an adverb, not an adjective. It describes the manner in which an action is performed, rather than the quality of a person. The sentence requires an adjective to describe the person among criminals, making "meanly" grammatically incorrect in this context.
   • Option 4 ("most meaner"): This option is grammatically incorrect because it combines "most" with the comparative form "meaner." In English, "most" is used with adjectives to form the superlative, but it should not be combined with a comparative form. The correct superlative form is "meanest," not "most meaner."

In conclusion, Option 2 ("meanest") is the correct choice because it appropriately uses the superlative form to indicate that the person is the most mean among a group of criminals.

The correct option is 4:

The sentence requires a comparative structure to compare two characteristics of the same subject ("She"): being lazy and being stupid. When we compare two qualities belonging to the same person or thing, we must use the "more [adjective] than [adjective]" construction, even if the adjective is a short one that would typically take the "-er" ending in a standard comparison between two different entities. This grammatical rule is known as the comparison of two qualities in one subject, and it ensures clarity and emphasizes that the comparison is internal to the subject. The adjective "lazy" is an exception that usually forms its comparative as "lazier," but in this specific structure (comparing two traits of 'She'), the use of "more lazy" is mandatory for correct grammar. The complete, grammatically sound sentence becomes: "She is more lazy than stupid." This means that her laziness is a more prominent characteristic than her stupidity.

The incorrect option is 1:

Option 1, "lazier," is the standard comparative form of the adjective "lazy," which is used when comparing two different people or things (e.g., "She is lazier than her brother"). However, when comparing two qualities of the same subject ("lazy" versus "stupid"), English grammar requires the use of the "more [adjective] than [adjective]" structure to distinguish between two attributes of one person. Therefore, using "lazier than stupid" is grammatically incorrect in this context of parallel comparison of two internal traits.

The incorrect option is 2:

Option 2, "more lazier," is incorrect because it involves a redundancy known as a double comparative. The comparative form of "lazy" is already created either by adding the suffix "-er" (lazier) or by placing the word "more" before it (more lazy). Using both "more" and the "-er" suffix simultaneously (more lazier) creates a grammatical error, making it unacceptable in standard English.

The incorrect option is 3:

Option 3, "lazy," is the base form (positive degree) of the adjective. While the sentence compares two qualities ("lazy" and "stupid"), the inclusion of the word "than" clearly signals that a comparison is being made, thus requiring the comparative degree of the adjective, not the positive degree. If we used "lazy," the sentence would read "She is lazy than stupid," which is grammatically nonsensical because the positive degree cannot be followed directly by "than" in a comparative construction.

The correct option is 4:

The sentence requires a word to describe how she entered the room. In English grammar, words that modify verbs (like "entered") are called adverbs. The standard form for an adverb is often created by adding '-ly' to an adjective. The adjective 'quiet' means making little or no noise; the adverb 'quietly' means doing something in a quiet manner or with little noise. Given the context "since the baby was sleeping," the action of entering the room must be performed in a quiet manner to avoid waking the baby. Therefore, the adverb 'quietly' is the grammatically correct and most appropriate word to complete the sentence, serving to modify the verb 'entered'.

The incorrect option is 1:
'Quiet' is an adjective, meaning silent or characterized by an absence of noise. Adjectives modify nouns, not verbs. In this sentence, the word is needed to describe the action of 'entered', making the adjective form grammatically incorrect.

The incorrect option is 2:
'Quitely' is not a recognized word in standard English. It appears to be a misspelling or an incorrect formation of the adverb 'quietly'.

The incorrect option is 3:
'Quite' is an adverb of degree, meaning completely, entirely, or very (often used for emphasis). For example, "The room was quite large." It does not describe the manner of the verb "entered" in relation to sound, and thus, it does not fit the meaning required by the context that the entry should be silent because the baby was sleeping.

The correct option is 1:
The sentence requires an adverb to modify the verb "walks," describing the manner in which the action is performed. The word "fast" serves as both an adjective and an adverb in English, making it the correct choice to describe the speed of walking. Unlike many other adverbs, which are formed by adding '-ly' to an adjective (e.g., slowly, quickly), "fast" is one of the irregular flat adverbs that maintains the same form as its adjective counterpart. Therefore, to correctly complete the structure "He walks very [adverb]," "fast" is grammatically sound and fits the context of describing speed, leading to the construction "He walks very fast."

The incorrect option is 2 (quick):
"Quick" is primarily an adjective, meaning swift or rapid, and it modifies nouns (e.g., a quick walk). While it can occasionally be used informally as a flat adverb, the standard and formally correct adverbial form is "quickly." Since an adverb is strictly required to modify the verb "walks" and "quick" is typically an adjective, it is inappropriate in this formal grammatical context.

The incorrect option is 3 (slow):
"Slow" functions as an adjective in this context (e.g., a slow walk). While "slow" can sometimes be used as a flat adverb, the standard and unambiguous adverbial form is "slowly." Furthermore, choosing "slow" would contradict the implied meaning often associated with "walks very..." in a general description, which usually suggests a brisk pace, although grammatically, the primary issue is the adverbial function being better served by "slowly."

The incorrect option is 4 (fastly):
"Fastly" is grammatically incorrect and does not exist in standard English. Although the suffix '-ly' is commonly used to form adverbs, "fast" is an exception, as explained above. The creation of the word "fastly" by adding the '-ly' suffix to the adjective "fast" is a common error made by English learners who over-generalize the rule, but it is not an acceptable form.

The sentence in question is: "It is .......... cold today: please don't go out for a walk."

1. Explanation for Option 1 ("very"):
   The adverb "very" is used to emphasize the degree or intensity of an adjective or another adverb. In this sentence, "very" is the most appropriate choice because it intensifies the adjective "cold," indicating that the temperature is significantly low. The use of "very" effectively conveys the idea that the cold is severe enough to warrant a warning against going out for a walk. Therefore, "It is very cold today" is a grammatically correct and contextually appropriate sentence.

2. Explanation for why the other options are incorrect:

   • Option 2 ("some"):
     The adverb "some" is not typically used to modify adjectives like "cold" in this context. "Some" is more commonly used to indicate an unspecified amount or degree, but it does not convey the intensity needed in this sentence. Saying "It is some cold today" would sound awkward and does not emphasize the severity of the cold.

   • Option 3 ("much"):
     While "much" can be used to modify adjectives, it is usually used in negative sentences or questions (e.g., "Is it much colder today?"). In affirmative sentences, "much" is not typically used to intensify adjectives like "cold." Therefore, "It is much cold today" is not grammatically correct in this context.

   • Option 4 ("little"):
     The adverb "little" suggests a small degree or amount, which contradicts the warning given in the sentence. Using "little" would imply that the cold is not severe, which does not align with the advice to avoid going out for a walk. Thus, "It is little cold today" does not fit the context of the sentence.

In conclusion, Option 1 ("very") is the correct choice because it appropriately intensifies the adjective "cold," aligning with the context of the sentence that advises against going out due to the severe weather.

Option 1, "never," is the most suitable adverb to complete the sentence "We should _____ get down from a moving train." This option is correct because it emphasizes the importance of safety and the inherent danger involved in attempting to disembark from a moving train. Here is a detailed explanation supporting this choice:

1. Safety Concerns: Getting down from a moving train is extremely dangerous and can lead to severe injuries or fatalities. The use of "never" underscores the absolute prohibition against such an action, aligning with safety protocols and common sense.

2. Regulatory Guidelines: Many railway authorities and safety organizations explicitly advise passengers to never attempt to get off a moving train. This is a standard safety rule intended to protect passengers from harm.

3. Logical Consistency: The word "never" conveys a sense of absolute negation, which is appropriate in contexts where the action in question is universally inadvisable or prohibited.

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

2. Option 2: often - The word "often" suggests a frequency that implies regularity or common practice. It is inappropriate in this context because getting down from a moving train should not be a regular or common action due to the associated risks.

3. Option 3: sometimes - "Sometimes" implies that there are occasions when it might be acceptable to get down from a moving train. This is misleading and dangerous, as there are no safe circumstances under which this action should be taken.

4. Option 4: ever - While "ever" can imply a negative context when used in certain constructions (e.g., "Don't ever"), on its own, it lacks the definitive prohibition conveyed by "never." It does not clearly communicate the absolute nature of the prohibition against getting down from a moving train.

In conclusion, Option 1, "never," is the correct choice because it accurately reflects the absolute prohibition and safety imperative against disembarking from a moving train.

An adverb is a versatile part of speech that plays multiple roles in modifying and describing various elements within a sentence. Let's explore why Option 4, "All options are right," is the correct answer by examining each of the given options:

1. Describes action: Adverbs often describe how an action is performed. For example, in the sentence "She runs quickly," the adverb "quickly" describes the manner in which the action of running is performed. This shows that adverbs can indeed describe actions, supporting Option 1.

2. Modifies verbs: One of the primary functions of adverbs is to modify verbs. They provide additional information about how, when, where, or to what extent an action occurs. For instance, in "He speaks softly," the adverb "softly" modifies the verb "speaks" by indicating the manner of speaking. This confirms that adverbs modify verbs, aligning with Option 2.

3. Modifies adjectives: Adverbs can also modify adjectives, enhancing or altering their meaning. For example, in "She is very talented," the adverb "very" modifies the adjective "talented" by intensifying its degree. This demonstrates that adverbs can modify adjectives, supporting Option 3.

Given that adverbs can describe actions, modify verbs, and modify adjectives, all three options are correct. Therefore, Option 4, "All options are right," accurately encompasses the full range of functions that adverbs perform. This comprehensive understanding justifies why Option 4 is the correct answer, as it acknowledges the multifaceted role of adverbs in language.

In the given sentence, "The soldiers fought _______," we need to fill in the blank with an adverb that accurately describes how the soldiers fought. The correct answer is Option 3: "Bravely."

1. Explanation for Option 3 (Bravely):

   • The word "bravely" is an adverb that describes the manner in which an action is performed, specifically indicating courage and valor. In the context of soldiers fighting, "bravely" is the most appropriate choice because it conveys the idea that the soldiers displayed courage and fearlessness in battle. Soldiers are often expected to show bravery, especially in challenging and dangerous situations, making "bravely" the most fitting adverb to complete the sentence.

2. Explanation for why other options are incorrect:

   • Option 1 (Partly): The adverb "partly" means to some extent or not completely. It does not appropriately describe how soldiers would fight, as it suggests an incomplete or partial effort, which is not typically associated with the expected conduct of soldiers in battle.
   • Option 2 (Luckily): The adverb "luckily" implies that something happened by chance or good fortune. It does not describe the manner of fighting, as fighting is an action that requires skill and intent, not luck. Therefore, "luckily" is not suitable in this context.
   • Option 4 (Clearly): The adverb "clearly" means in a clear or understandable manner. It does not relate to the manner of fighting, as it is more about clarity of perception or expression rather than the conduct of an action like fighting.

In conclusion, "bravely" is the correct adverb to use in the sentence because it accurately describes the expected courageous behavior of soldiers in combat, aligning with the context and meaning of the sentence.

#ERROR!

Option 4, "eagerly," is the correct word to fill in the blank in the sentence: "Why didn't you turn up at the party? We were all _____ waiting for you."

1. Explanation for Option 4 (eagerly):

   • The word "eagerly" means with keen interest or intense desire. In the context of the sentence, it suggests that the people at the party were looking forward to the person's arrival with great anticipation and enthusiasm. This choice of word conveys a sense of excitement and expectation, which is appropriate for a social event like a party where attendees are often eager to see their friends or special guests.

2. Explanation for why other options are incorrect:

   • Option 1 (densely): The word "densely" refers to something being closely compacted or crowded together. It is typically used to describe physical spaces or populations, not emotions or states of anticipation. Therefore, it does not fit the context of waiting for someone at a party.

   • Option 2 (perfectly): "Perfectly" means in a manner that is free from flaws or defects. While it can describe how something is done, it does not convey the emotional anticipation or excitement associated with waiting for someone. Thus, it is not suitable for this context.

   • Option 3 (nearly): The word "nearly" means almost or not quite. It is used to indicate proximity or closeness in terms of time, quantity, or degree. It does not express the emotional state of anticipation or excitement, making it an inappropriate choice for describing how people were waiting at the party.

In summary, "eagerly" is the most fitting word to describe the emotional anticipation and excitement of waiting for someone at a party, which is why Option 4 is the correct answer.

The correct answer to fill in the blank is "carefully," which is Option 4. Here is a detailed explanation justifying why this option is correct and why the others are not:

1. Explanation for Option 4 (Carefully):

   • The sentence states that the report must be read in a manner that allows for performance improvement. Reading something "carefully" implies paying close attention to details, understanding the content thoroughly, and ensuring that no important information is missed. This careful reading is essential for identifying areas of improvement and making informed decisions to enhance performance. Therefore, "carefully" is the most appropriate word to fill in the blank, as it aligns with the goal of improving performance.

2. Explanation for why other options are incorrect:

   • Option 1 (Sorrowfully):

     • "Sorrowfully" means with sadness or regret. Reading a report sorrowfully does not contribute to improving performance, as it focuses on an emotional response rather than a constructive analysis of the content. Therefore, this option does not fit the context of the sentence.

   • Option 2 (Awfully):

     • "Awfully" generally means very badly or unpleasantly. Reading a report awfully suggests a negative or careless approach, which would not help in understanding the report or improving performance. This option is inappropriate for the context, as it contradicts the objective of enhancing performance.

   • Option 3 (Mischievously):

     • "Mischievously" implies a playful or naughty manner, often with the intent to cause trouble or amusement. Reading a report mischievously would not be serious or focused, and it would not contribute to identifying areas for improvement. This option is unsuitable for the context of the sentence.

In conclusion, Option 4, "carefully," is the correct choice because it aligns with the objective of reading the report in a manner that facilitates performance improvement. The other options do not support this goal and are therefore incorrect.

Option 1, "perfunctorily," is the correct choice to fill in the blank in the sentence: "He disliked his job heartily, and therefore it was no surprise that he discharged his duties so _____."

1. Explanation for Option 1: Perfunctorily

   • The word "perfunctorily" means performing a task with minimal effort or reflection, often out of a sense of duty rather than interest or enthusiasm. In the context of the sentence, the subject dislikes his job, which suggests a lack of motivation or interest in performing his duties. Therefore, it is logical that he would carry out his responsibilities in a perfunctory manner, doing only what is necessary without any extra effort or engagement. This aligns perfectly with the sentiment expressed in the sentence.

2. Explanation for why other options are incorrect:

   • Option 2: Dogmatically

     • "Dogmatically" refers to asserting opinions in an authoritative or arrogant manner, often without consideration for evidence or the opinions of others. This does not fit the context of the sentence, as it does not relate to the manner in which duties are performed when one dislikes their job. The sentence implies a lack of enthusiasm, not an authoritative assertion of opinions.

   • Option 3: Sardonically

     • "Sardonically" means doing something in a mocking or cynical manner. While it might suggest a negative attitude, it does not accurately describe the way duties are performed when someone dislikes their job. The sentence focuses on the lack of effort or care, rather than a mocking or cynical approach.

   • Option 4: Wantonly

     • "Wantonly" means doing something in a reckless or deliberate manner without regard for consequences. This does not fit the context of the sentence, as it implies a level of intentionality or recklessness that is not suggested by the dislike of the job. The sentence implies a lack of care or effort, not reckless behavior.

In conclusion, "perfunctorily" is the most appropriate word to fill in the blank, as it accurately reflects the lack of enthusiasm and minimal effort associated with performing duties when one dislikes their job.

The correct option is 3:

When we speak about a relationship or a connection that originated from a specific time or place, we often use the preposition "of" to introduce the source or context of that relationship. The phrase "an old friend of" is a standard and idiomatic construction in English, where "of" indicates the origin or category of the friendship—in this case, the time when the speaker and Mary became friends, which was during their "school times." Therefore, "She is an old friend of school times" means their friendship stems from or is characterized by that period. This usage helps to qualify the noun "friend," linking it directly to the period during which the friendship was formed.

The incorrect option is 1 (from): "From" is typically used to denote separation or a starting point in time or space. While you might say "I've known her from school days," the construction "old friend from school times" is less common and less idiomatic than "old friend of school times" in this specific structure.

The incorrect option is 2 (to): "To" generally indicates movement toward a destination, a recipient, or a time limit. It does not fit the context of establishing the origin or context of a friendship as described here.

The incorrect option is 4 (in): "In" is commonly used to indicate a location or a period of time (e.g., "in school," "in the summer"). While "in" might work if the sentence structure was slightly different (e.g., "She was my friend in school"), placing it directly after "old friend" in this phrasing makes the sentence grammatically awkward and non-idiomatic.

The correct option is 3:
The correct preposition to complete the sentence "This was enjoined.......him as a solemn duty" is "on." The verb "enjoin" means to instruct or urge someone to do something, often with authority or seriousness. When used in the passive voice, as in this sentence ("This was enjoined..."), the appropriate preposition to link the command or duty to the person receiving it is almost always "on" or "upon." This construction, "to enjoin something on someone," means to formally impose a duty or responsibility on that individual. In this context, the solemn duty was placed directly upon him.

The incorrect option is 1 (over): "Over" is generally used to denote position above something, duration, or authority (e.g., "ruling over a territory"). It does not fit the idiomatic or grammatical requirement of the verb "enjoin," as one does not typically enjoin a duty "over" a person.

The incorrect option is 2 (at): "At" is used for specific points in space or time, or for targets of an action (e.g., "look at him"). It is grammatically incompatible with the transitive verb "enjoin" in this passive construction, failing to convey the sense of imposition.

The incorrect option is 4 (for): "For" is used to indicate purpose, benefit, or duration. While the duty is "for" him in a broad sense, the phrasal verb structure required here is fixed. Using "for" changes the meaning, suggesting the duty was intended to benefit him rather than being imposed as a responsibility.

The correct option is 3:
The correct preposition to use when referring to a specific, precise point in time, such as an hour on a clock, is "at." In English grammar, "at" is used for clock times ('at 7 o'clock,' 'at midnight'), holidays ('at Christmas'), and specific points in time ('at the moment'). The sentence "I shall come back at 7 O'clock" correctly indicates the exact time of return, making "at" the only grammatically and contextually appropriate choice for this specific time reference. This rule is fundamental to using prepositions of time accurately.

The incorrect option is 1:
The preposition "in" is generally used for longer, non-specific periods of time, such as months ('in July'), years ('in 2024'), seasons ('in winter'), or general parts of the day ('in the morning'). It can also refer to a duration or the end of a future period ('in ten minutes'). It is not used to denote a precise clock time like '7 O'clock.'

The incorrect option is 2:
The preposition "to" is typically used to express movement toward a place or person ('go to the store') or to indicate a range of time ('from Monday to Friday'). While "to" can sometimes be used in time expressions (e.g., 'twenty minutes to seven'), it is never used in the context of specifying a single, exact time of arrival or return after the verb phrase "come back."

The incorrect option is 4:
The preposition "for" is used to indicate duration ('for two hours') or purpose ('a gift for you'). It is incorrect in this sentence because '7 O'clock' is a specific time, not a duration of time, and using "for" would incorrectly imply that the speaker is coming back for the duration of 7 O'clock, which makes no sense in standard English usage.

In the given sentence, "She is sitting next ........ her brother in the second row," the task is to choose the correct preposition to complete the sentence meaningfully. The correct answer is Option 3: "To."

1. Explanation for Option 3 ("To"):

   • The phrase "next to" is a commonly used prepositional phrase in English that indicates proximity or adjacency. It means that someone or something is immediately beside another person or object. In this context, "She is sitting next to her brother" implies that she is sitting directly beside her brother in the second row. This usage is standard and widely accepted in English to convey the idea of being adjacent or alongside.

2. Explanation for why other options are incorrect:

   • Option 1 ("By"): While "by" can sometimes indicate proximity, it is not as precise as "next to" when describing someone sitting directly beside another person. "By" can imply a general closeness but does not specifically convey the idea of being immediately adjacent.
   • Option 2 ("Towards"): "Towards" indicates direction rather than position. It suggests movement in the direction of something but does not describe a static position of sitting beside someone.
   • Option 4 ("On"): "On" is used to indicate a position atop a surface, which does not fit the context of sitting beside someone. It would be incorrect to say "sitting next on her brother," as it does not convey the intended meaning of adjacency.

Therefore, Option 3 ("To") is the correct choice because it accurately and precisely describes the position of sitting directly beside her brother in the second row.