Select the phrase in the following sentence that is not used correctly: He had never had to be on his own in the past.

Correct Answer: C

Rationale: The phrase 'to be' is not used correctly in the sentence. The correct phrase should be 'to be' in this context. The infinitive form of the verb 'be' is used after 'to.' In this sentence, the infinitive form 'to be' should follow 'had' to form the correct structure. Choices A, B, and D are all used appropriately in the sentence, focusing on the order and placement of the words in the context provided.

Correct Answer: B

Rationale: The correct punctuation needed in the sentence is a comma. The sentence should be: 'Follow my lead, I have been performing this procedure for years.' The comma is necessary to separate the introductory phrase 'Follow my lead' from the main clause that follows. The other choices are incorrect because a period would create two separate sentences, an exclamation point is not suitable for the context, and a semicolon would be too strong of a punctuation mark for this sentence structure.

Correct Answer: B

Rationale: The verb 'raised' should be used in the past tense to match the past event (lecture was over). Therefore, the correct phrase is 'raised their hands to ask questions.' In English, when referring to a past event, the past tense of the verb is typically used to maintain proper grammar and clarity. Choice A is incorrect because it uses the present tense 'raise' instead of the past tense. Choice C is incorrect as it uses the present perfect tense 'have raised,' which is not suitable for a simple past event. Choice D is incorrect as it uses the present continuous tense 'are raising,' which is not appropriate for a completed past action.

Correct Answer: C

Rationale: The word 'initial' is used incorrectly in the sentence. The correct word that should be used here is 'initially.' 'Initially' is an adverb that is used to indicate the beginning or starting point of an action, while 'initial' is an adjective that describes something as happening at the beginning of a process. In this context, the correct usage would be 'He received an oral dose initially, followed by an IV drip.' The other choices ('received,' 'dose,' and 'followed') are used correctly in the sentence and do not need any corrections.

Correct Answer: B

Rationale: The correct pronouns to use as objects of the verb 'told' are 'her' and 'me.' Therefore, the grammatically correct sentence is: 'Dr. Chu told her and me to take a break for lunch.' 'Her' is used as the object form of 'she,' and 'me' is the object form of 'I' in this context. Choice A is incorrect because 'me' should come before 'her' in the sentence. Choice C is a duplicate of the correct answer. Choice D is incorrect because 'she' should be 'her' and 'I' should be 'me' to function as objects in the sentence.