Grammar for HESI A2

Correct Answer: A

Rationale: The correct answer is A: operate. In this sentence, "Two students operate the machine" is the correct form because it matches the subject-verb agreement in present tense. The other choices are incorrect because B: operating is a present participle and does not match the subject-verb agreement, C: were operating is past continuous tense which is not needed here, and D: has been operating is present perfect continuous tense which is also not appropriate for this sentence. Therefore, the correct choice is A: operate.

Correct Answer: A

Rationale: The correct answer is A: its. In this sentence, "committee" is a singular noun, so the possessive pronoun should also be singular. "Its" is the possessive form for singular nouns, while "their" (B) is plural. "It's" (C) is a contraction for "it is" and does not show possession. "They're" (D) is a contraction for "they are" and is also incorrect. Therefore, "its" is the only option that correctly agrees with the singular noun "committee."

Correct Answer: A

Rationale: The correct answer is "A: she." In this sentence, the pronoun needs to refer back to a singular female subject. "She" is the appropriate pronoun in this context. The other choices are incorrect because "he" refers to a singular male subject, "them" is plural, and "hers" is a possessive pronoun that doesn't fit the context of the sentence.

Correct Answer: B

Rationale: The correct punctuation needed in the sentence is a comma (choice B). A comma is required after "class" to separate the two independent clauses ("Do not be afraid to ask questions in his class" and "he is very approachable..."). This comma helps to avoid a run-on sentence and improves readability. Explanation of other choices: A: Hyphen - Hyphens are used to join words or parts of words. There is no need for a hyphen in this sentence. C: Apostrophe - Apostrophes are used for contractions or to show possession. Neither is needed in this sentence. D: Semicolon - Semicolons are used to connect two closely related independent clauses. However, a semicolon would not be appropriate here as the two clauses are not closely related enough to warrant this stronger punctuation mark.

Correct Answer: C

Rationale: The correct answer is C. The word "complements" is spelled incorrectly as "compliments." The verb "complement" means to enhance or complete something, which is the intended meaning in this sentence. The word "compliments" is a noun and refers to expressions of praise or admiration. The incorrect spelling changes the meaning of the sentence. A, B, and D are spelled correctly and are contextually appropriate in the sentence.