Correct Answer: D

Rationale: The phrase 'in the auditorium' is misplaced in the sentence because it suggests that the dangers of drugs and alcohol were in the auditorium, which is not the intended meaning. It would make more sense for this phrase to come immediately after 'he informed us' to indicate where the presentation took place. Choices A, B, and C are all correctly placed within the sentence, providing necessary information about the context and topic of the presentation.

Correct Answer: B

Rationale: The correct sentence should be: 'Because of a major accident on the freeway, the emergency room was overcrowded.' A comma is needed after 'freeway' to separate the introductory dependent clause from the independent clause that follows. Choice A (Period) is incorrect as it would create two separate sentences. Choice C (Exclamation point) is incorrect as there is no exclamation in the sentence. Choice D (Semicolon) is incorrect as it is used to separate closely related independent clauses.

Correct Answer: D

Rationale: The correct answer is 'D: will be given.' In the sentence, the future passive voice is needed to convey that Angela will receive the employee discount if she attends the seminar. 'Will be given' is the appropriate phrase to express this passive construction. Choices A, B, and C are incorrect as they do not form the correct future passive structure required in the sentence.

Correct Answer: C

Rationale: The word 'boys'' should be spelled as 'boys' in this context. The correct possessive form of the plural noun 'boys' does not require an apostrophe before the final S, which indicates possession. In this sentence, the intent is to show that the pranks belong to the four boys collectively, so the correct possessive form is 'boys' without the additional apostrophe.

Correct Answer: B

Rationale: The word 'infer' is used incorrectly in the sentence. 'Infer' means to deduce or conclude something based on evidence and reasoning, while in the sentence, the speaker is actually asking if the grimace suggests that the person hated the performance. The correct word that should be used in this context is 'imply' or 'suggest.' 'Grimace' (choice A), 'loathed' (choice C), and 'performance' (choice D) are all used appropriately in the sentence.