Correct Answer: A

Rationale: The phrase 'of workers' is misplaced in the sentence because the preposition 'of' is unnecessary and disrupts the flow of the sentence. It creates redundancy as 'a number of workers' can be simplified to 'workers.' Removing this unnecessary prepositional phrase would make the sentence clearer and more concise. Choice B 'from my car window' is correctly placed as it provides context on where the observation was made. Choice C 'who were repairing the road' and Choice D 'alongside the mall' are essential parts of the sentence providing details about the workers' activity and location, respectively.

Correct Answer: B

Rationale: The correct punctuation needed in the given sentence is a comma after 'class.' This comma is necessary to separate the two independent clauses 'Do not be afraid to ask questions in his class' and 'he is very approachable and explains things well.' Commas are used to separate independent clauses when they are joined by a coordinating conjunction like 'and.' Choice A, 'Hyphen,' is incorrect as a hyphen is not needed to connect any words in the sentence. Choice C, 'Apostrophe,' is incorrect as there is no possession or contraction being indicated in the sentence that requires an apostrophe. Choice D, 'Semicolon,' is incorrect as a semicolon is not used to join two independent clauses in this context; a comma followed by a coordinating conjunction is more appropriate.

Correct Answer: A

Rationale: In this sentence, "committee" is a singular noun, so the correct pronoun to use is "its." The possessive pronoun "its" indicates that the committee is taking ownership of the report it finished. Choice B, "their," is incorrect as it is a plural pronoun and does not agree with the singular noun "committee." Choices C and D are also incorrect as they represent contractions ("it's" for "it is" and "they're" for "they are"), which do not fit in the context of showing possession of the report by the committee.

Correct Answer: C

Rationale: In this sentence, the pronoun should refer to Luis, who borrowed the money. Since Luis is a male, the correct pronoun to use in this context is 'him.' Therefore, the correct answer is 'him.' Choices A, B, and D are incorrect as they do not match the gender of Luis or do not make sense in the context of the sentence.

Correct Answer: B

Rationale: In the sentence, "The staff sergeant and I reviewed the enlisted men's records," the pronoun "I" refers to the subject of the sentence, which is the speaker. When combining the staff sergeant and the speaker "I," the correct pronoun to use is "we," which is the plural form of "I." Therefore, the word "We" is best to substitute for the underlined words in the sentence. Choice A, "Us," is incorrect as it is an object pronoun and does not match the subject position in the sentence. Choice C, "They," is also incorrect as it refers to a third-party group, not including the speaker and the staff sergeant. Choice D, "He," is incorrect as it does not include both the staff sergeant and the speaker in the pronoun substitution.