Which word is used incorrectly in the following sentence? The professor was once an intern in this hospital back in the 1980s.

Correct Answer: B

Rationale: In the given sentence, the word 'once' is used incorrectly. The original sentence implies that the professor was an intern in the hospital at a specific time in the past, not just once. The word 'formerly' would imply that the professor used to be an intern but is no longer. Therefore, 'once' is the incorrect word choice in this context. The other options ('professor,' 'intern,' 'hospital') are all used correctly in the sentence.

Correct Answer: A

Rationale: The word 'her' is the best substitute for the underlined words 'the nurse' in the sentence. This substitution avoids redundancy and provides clarity by referring back to the nurse as a third-person singular pronoun, maintaining coherence and avoiding ambiguity. 'He' (choice B) and 'his' (choice C) are incorrect as they do not align with the gender of the nurse in the sentence. 'It' (choice D) is also incorrect as it does not refer appropriately to a person.

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.

Correct Answer: D

Rationale: The word 'although' is the best fit in the sentence because it indicates a contrast between the fact that the emergency room was not busy last night and the head nurse's decision not to let anyone end her shift early. 'Although' sets up a contrast by acknowledging the first part of the sentence while introducing the surprising or unexpected information that follows. Choices A, B, and C do not provide the appropriate contrast needed in this context. 'Because' implies causation, 'Provided that' implies a condition for something to happen, and 'As if' implies a comparison rather than a contrast.

Correct Answer: D

Rationale: The correct form in this sentence is 'inputting,' as it is the gerund form of the verb 'input.' The gerund form is used to show that Kalinda spends part of her day engaging in the ongoing action of inputting data from the lab. Choice A ('inputs') is incorrect as it is the third-person singular form of the verb, which does not fit here. Choice B ('input') is incorrect as it is the base form of the verb and does not convey the ongoing action required in this context. Choice C ('having input') is incorrect as it suggests a completed action rather than an ongoing one.