Select the phrase that will make the following sentence grammatically correct. When the lecture was over, two students ___________.

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: 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.

Correct Answer: B

Rationale: The sentence is written in the first-person point of view, so the appropriate pronoun to use as a substitute for 'Francesca, Bill, and I' would be 'we.' This choice maintains the correct subject-verb agreement and ensures consistency in the sentence structure by keeping the pronoun in the nominative case. Choice A, 'They,' is incorrect as it changes the subject of the sentence, leading to a lack of agreement between the pronoun and the verb. Choices C and D, 'Them' and 'Us,' are both objective pronouns and do not fit the role of the subject in this sentence.

Correct Answer: A

Rationale: The correct punctuation needed in the sentence is a period. A period is used to indicate the end of a sentence. In this case, the sentence 'After you complete your rounds, please check in at the station.' is a complete thought and requires a period at the end to show that it is a complete sentence. The other choices are incorrect because a comma would not be suitable at the end of a sentence, a colon is used to introduce a list or an explanation, and a semicolon is used to connect two closely related independent clauses.

Correct Answer: C

Rationale: The word 'study' is used incorrectly in the sentence. The correct verb form should be 'studies' to match the subject 'Sidney,' which is singular. The sentence should read, 'Jack practices piano while Sidney studies for the exam.' The other choices ('practices,' 'while,' and 'exam') are used appropriately in the sentence.