Correct Answer: A

Rationale: The correct answer is A: 'Complaining.' Querulous means to be habitually complaining or whining. It is characterized by a tendency to find fault or raise petty objections. This behavior aligns with the definition of being querulous. Choices B, C, and D are incorrect as they do not reflect the meaning of querulous. Sleeping, shouting, or crying are not behaviors typically associated with being querulous.

Correct Answer: B

Rationale: The correct answer is B: 'To begin or put into practice.' 'Initiate' means to start or commence something. Choice A, 'To finish,' is incorrect because 'Initiate' refers to the beginning of something, not its conclusion. Choice C, 'To delay,' is incorrect as it is the opposite of what 'Initiate' means. Choice D, 'To stop completely,' is also incorrect as it is the opposite of starting or initiating something.

Correct Answer: B

Rationale: The correct answer is B, 'Vague.' Nebulous means something that is vague or unclear. Choice A, 'Clear,' is incorrect as it represents the opposite meaning of nebulous. Choice C, 'Precise,' is incorrect as it denotes clarity and exactness, which is the opposite of nebulous. Choice D, 'Obvious,' is also incorrect as it implies something that is easily understood or seen, unlike nebulous which refers to something unclear or hazy.

Correct Answer: B

Rationale: In the given sentence, the past continuous tense 'was studying' is the most appropriate choice to indicate an ongoing action in the past. 'Was preparing' (choice A) implies a completed action rather than an ongoing one. 'Had studied' (choice C) is past perfect tense, which is not suitable for indicating an ongoing action. 'Is studying' (choice D) is present continuous tense and does not fit the past context of the sentence.

Correct Answer: B

Rationale: The correct answer is B: 'Fake.' Counterfeit refers to something that is not genuine or a copy made to deceive. Choice A, 'Real,' is incorrect because counterfeit items are not real. Choice C, 'Accurate,' is incorrect as counterfeit implies inaccuracy. Choice D, 'Honest,' is incorrect as counterfeit items are deceptive and not honest.