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. Select the word or phrase that makes this sentence grammatically correct: 'Picking up groceries ____ one of the things you are supposed to do?'

Correct answer: A

Rationale: The correct answer is 'Is.' In this sentence, the subject 'picking up groceries' is singular, so it should be followed by the singular form of the verb 'to be,' which is 'is.' The verb should agree with the subject in number. 'Am' is incorrect as it is the first person singular form, 'Is it' creates an unnecessary question structure, and 'Are' is plural, not matching the singular subject. Therefore, 'Is' is needed to make the sentence grammatically correct.

3. Select the best word for the blank in the following sentence: 'The student sang well, but she danced ____.'

Correct answer: B

Rationale: 'Badly' is the correct adverb to modify 'danced'. In this context, 'badly' is used to describe the manner in which the student danced, indicating that her dancing performance was not good, contrasting with her singing ability. 'Poorly' (choice C) is also an adverb, but 'badly' is more commonly used in this context to describe performance in an artistic or skill-based activity. Choice D, 'poorer,' is incorrect as it is the comparative form of 'poor,' not the appropriate adverb to describe how she danced.

4. Which word is used incorrectly in the following sentence? The boys leapt up happy to assist their favorite teacher.

Correct answer: D

Rationale: The word 'their' is used incorrectly in the sentence. The correct word should be 'they're,' which is a contraction for 'they are.' The sentence should say: The boys leapt up, happy to assist their favorite teacher. Choice A, 'leapt,' is correctly used as the past tense of 'leap.' Choice B, 'happy,' is also correctly used as an adjective to describe the boys' emotional state. Choice C, 'assist,' is appropriately used as a verb to show the boys' willingness to help.

5. Select the phrase in the following sentence that is not used correctly. Before their hospitalization, the children had rarely eaten three meals a day.

Correct answer: C

Rationale: The phrase 'had rarely' is not used correctly in the sentence. The correct form should be 'rarely eaten' instead of 'had rarely' to convey the past tense of the children's eating habits before their hospitalization. 'Had rarely' is incorrect because it does not match the structure needed to describe the children's eating habits in the past. Choices A, B, and D are grammatically sound and fit appropriately in the sentence.

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Select the phrase that will make the following sentence grammatically correct. Three days from now, the horses ___________.
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