Correct Answer: C

Rationale: The correct adverb to describe Dean's action of eyeing the cheesecake is 'hungrily.' Adverbs modify verbs, in this case, 'eyed,' making the sentence grammatically correct. 'Hungry' (choice A) is an adjective and does not fit the sentence structure. 'Hungriest' (choice B) is a superlative adjective and is not suitable to modify the verb 'eyed.' 'More hungry' (choice D) is a comparative construction and is also not the correct form to modify the verb.

Correct Answer: A

Rationale: The correct answer is A: 'the students watched the snow begin to fall.' In this sentence, the structure is correct with the subject 'the students' followed by the verb 'watched' and the object 'the snow begin to fall' in a grammatically appropriate manner. Choices B, C, and D have issues with verb tense agreement and sentence structure, making them grammatically incorrect. Choice B changes the active voice to passive, choice C lacks a verb for the subject 'snow,' and choice D does not complete the action initiated in the introductory participial phrase.

Correct Answer: A

Rationale: In this sentence, 'lie' is the correct word for the patient wanting to recline on the bed, and 'lay' is the correct word for placing the tray of food on the table. Therefore, 'lie, lay' is the proper sequence of words for the actions described in the sentence. Choice B is incorrect because 'lie' should be used for reclining, not 'lay'. Choice C is incorrect as 'laid' is the past tense of 'lay,' not the present tense. Choice D is incorrect; 'lain' is the past participle of 'lie,' not the present tense.

Correct Answer: B

Rationale: 'But' is the conjunction in this sentence. A conjunction is a word that connects clauses or sentences. In this case, 'but' links two contrasting ideas: the little girl wanting a cookie and her decision not to take one. The other options are not conjunctions; 'little' is an adjective, 'take' is a verb, and 'the' is a definite article.

Correct Answer: B

Rationale: The correct word that should replace 'among' in the sentence is 'between' when referring to a distinction between two things. 'Among' is used when referring to more than two items or when the items are part of a group. In this context, 'between' is more appropriate as there are only two treatment protocols being compared.