Correct Answer: A

Rationale: The correct answer is A, 'Raised.' In this context, 'elevated' means to be lifted or raised up. The doctor's instruction implies keeping the patient's head in an upward position. Choices B, C, and D are incorrect. 'Turned' suggests a change in direction, 'still' means without movement, and 'thrown back' implies a forceful backward motion, none of which capture the meaning of 'elevated' in this scenario.

Correct Answer: C

Rationale: The correct answer is C, 'Surveillance,' which means 'under observation.' 'Cognition' (A) refers to mental processes, 'Isolation' (B) means being separated from others, and 'Assessment' (D) is the evaluation of something, none of which directly relate to being observed.

Correct Answer: C

Rationale: The correct meaning of 'ominous' is 'threatening' or indicating something bad is about to happen. A is incorrect because 'ominous' does not signify a good omen. B is incorrect as 'ominous' does not relate to deceit. D is incorrect as 'ominous' does not mean 'full of thought.' Therefore, the most suitable interpretation of 'ominous' in the given sentence is 'Threatening.'

Correct Answer: B

Rationale: The correct answer is 'B: Reason.' 'Rational' means based on reason or logic. Choice A, 'Angry,' is incorrect as it does not relate to the meaning of 'rational.' Choice C, 'Rodent,' is a completely unrelated term. Choice D, 'Proportion,' also does not capture the meaning of 'rational,' which is about being logical or reasonable.

Correct Answer: A

Rationale: The correct answer is A: 'Undesirable.' In this context, 'adverse' means harmful or undesirable, specifically referring to the negative side effects experienced from the medication. Choice B, 'Frequent,' is incorrect as 'adverse' does not imply how often the side effects occur but rather their nature. Choice C, 'Noticeable,' is incorrect as 'adverse' does not necessarily mean that the side effects are easily noticeable, but rather that they are harmful. Choice D, 'Constant,' is incorrect as 'adverse' does not indicate that the side effects are continuous but rather that they are negative.