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: 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: C

Rationale: In the sentence 'The bird flew across the blue sky,' 'bird' is the noun. A noun is a word that represents a person, place, thing, or idea. In this sentence, 'bird' represents a living creature, making it the noun. 'Across' is a preposition used to show the relationship between 'flew' and 'sky.' 'Flew' is a verb indicating an action, and 'blue' is an adjective describing the sky.

Correct Answer: D

Rationale: In the sentence, 'The nurses went to the conference room,' 'nurses' is the subject. The subject of a sentence is typically the noun or pronoun that carries out the action or is described in the sentence. In this case, 'nurses' is the noun performing the action of going to the conference room. Choices A, B, and C are not the subject. 'Conference' and 'room' are objects of the prepositions 'to' and 'the,' while 'went to' is the verb phrase indicating the action performed by the subject.

Correct Answer: D

Rationale: The correct answer is 'which' as it correctly introduces a defining clause describing the style of hair Tracey wore. 'Which' is used to provide additional information about the noun 'French braid' and helps specify the particular style among others. 'Among' (choice A) is incorrect as it is used to show a relation of one thing to many others. 'It' (choice B) is incorrect as it does not serve as a relative pronoun to introduce a clause. 'That' (choice C) is incorrect as it is not the most suitable relative pronoun to introduce a non-restrictive clause in this context.