(Find Error in sentence part)
A. the technician reminded/B. them to have a /C. thoroughly cleaning of the/D. machine after each use.

Question

(Find Error in sentence part) 
A. the technician reminded/B. them to have a /C. thoroughly cleaning of the/D. machine after each use.

Accepted Answer

The correct option is 4:
In this sentence, "after each use" refers to the frequency of the action, not the object or recipient of the action. Therefore, it is part D that contains the error. The phrase "after each use" correctly modifies the action of cleaning the machine, specifying when the cleaning should occur. The instruction is to identify the part of the sentence that contains an error. The error lies in the word "thoroughly" in part C, which is an adverb modifying the noun "cleaning". The correct usage should be "thorough cleaning," where "thorough" is an adjective modifying "cleaning."

The incorrect option is 1 (A. the technician reminded): This part of the sentence is grammatically correct. "The technician" is the subject, and "reminded" is the past tense verb. There is no error here.

The incorrect option is 2 (B. them to have a): This part is also grammatically sound. "Them" is the object of "reminded," and "to have a" introduces the infinitive phrase indicating what they were reminded to do. There is no error in this segment.

The incorrect option is 3 (C. thoroughly cleaning of the): This is where the error lies. "Cleaning" is a noun in this context, referring to the act of cleaning. An adjective should be used to describe a noun, not an adverb. Therefore, "thoroughly" (an adverb) should be replaced with "thorough" (an adjective) to correctly modify "cleaning." The correct phrase would be "a thorough cleaning."