select the word or phrase that makes the following sentence grammatically correct two students the machine while the third oversaw their work
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HESI A2

Grammar for HESI A2

1. Select the word or phrase that makes the following sentence grammatically correct. Two students ___________ the machine while the third oversaw their work.

Correct answer: A

Rationale: The word 'operate' is the correct choice as it agrees with the verb tense used in the sentence. In this case, the sentence requires the simple past tense. The correct form should be 'Two students operate the machine while the third oversaw their work.' Choices B, C, and D are incorrect because they do not match the required verb tense for the sentence. 'Operating' (choice B) is a present participle, 'were operating' (choice C) is past continuous, and 'has been operating' (choice D) is present perfect continuous, none of which fit the context of the sentence.

2. Which word is used incorrectly in the following sentence? Which criteria were used to draw a conclusion about their findings?

Correct answer: C

Rationale: The word 'draw' is used incorrectly in the sentence. The correct word that needs to be used is 'criteria' instead of 'criterion' to maintain subject-verb agreement. The correct sentence should be: 'Which criteria were used to draw a conclusion about their findings?' 'Draw' should be 'were drawn' to match the plural subject 'criteria.' The other choices are correct in the sentence and do not contain any errors.

3. What word is best to substitute for the underlined words in the following sentence? The coats hanging on the hooks are the patients’.

Correct answer: B

Rationale: The word 'their' is the correct possessive pronoun to use in this sentence because it indicates that the coats belong to multiple patients. 'Their' shows ownership by a plural group, which is the most suitable choice in this context. Choice A, 'his,' is singular and would imply that all the coats belong to one male patient, which is not the case. Choice C, 'them,' is a pronoun used for indicating objects or people and not possession. Choice D, 'theirs,' is a possessive pronoun but is used to refer to something that belongs to multiple people, not in this case where the coats belong to the patients.

4. Which word is used incorrectly in the following sentence? That is the doctor whose diploma is hung on the partition.

Correct answer: B

Rationale: The word 'whose' in the sentence should be 'whose.' 'Whose' is the correct possessive form used to indicate that the diploma belongs to the doctor. 'Who's' is a contraction for 'who is' or 'who has,' which does not make sense in this context. The other words in the sentence - 'That,' 'hung,' and 'partition' are all used correctly in the sentence.

5. Select the word or phrase that makes the following sentence grammatically correct: I was extremely surprised ___________ of her dismissal from the staff.

Correct answer: B

Rationale: The correct phrase to use with 'surprised' in this sentence is 'to learn.' In this context, 'to learn' functions as an infinitive to indicate the purpose or reason for the surprise. 'Learning' (Choice A) is incorrect as it doesn't serve as an infinitive in this sentence. 'Of learning' (Choice C) is incorrect as it doesn't provide the correct structure needed in the sentence. 'Have learned' (Choice D) is incorrect because the verb tense does not match the context of the sentence.

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