Correct Answer: B

Rationale: The correct answer is B, 'While the band played.' This is an incomplete sentence as it lacks a main clause. The other choices (A, C, D) are complete sentences with a subject and a predicate, conveying a complete thought.

Correct Answer: B

Rationale: Choice B is incorrect due to the use of 'than' instead of 'then.' The correct word in this context is 'then' to indicate the order of actions. Choices A, C, and D are all grammatically correct. In choice A, the sentence structure is correct with a clear cause-effect relationship. Choice C is grammatically sound, describing the dietician's mistake. Choice D is also grammatically correct, showing a cause (the child feeling ill) leading to an effect (the nurse sending him home).

Correct Answer: A

Rationale: 'Occluded' means blocked or obstructed, making 'Obstructed' the correct answer. In the context of a patient having an occluded artery, it implies that the artery is blocked. The other options, 'Open,' 'Broken,' and 'Cloudy,' do not accurately describe a blocked artery.

Correct Answer: C

Rationale: The correct answer is C: 'cause it to happen.' 'Implement' means to put something into action or cause it to happen. Choices A, B, and D are incorrect because they do not reflect the meaning of 'implement.' Preventing something from occurring (Choice A), emphasizing the importance of something (Choice B), and following something from beginning to end (Choice D) are all different actions or concepts that do not align with the definition of 'implement.'

Correct Answer: D

Rationale: In this sentence, 'quickly' is the correct adverb form that should be used to modify the verb 'answering.' 'Quickly' is the adverb form needed here to describe how the action is performed. Choices A, B, and C are incorrect because they do not provide the appropriate adverb form required in the sentence.