Correct Answer: A

Rationale: The correct answer is A. A child with a stuffy nose might find it hard to breathe. 'Breathe' is the correct verb form in this sentence. 'Breathing' is the present participle form and could also work, but in the context of the sentence, 'breathe' is more suitable. 'Breath' is a noun referring to a single inhalation or exhalation of air, not the correct form in this context. 'Breadth' is a noun referring to the extent or measure of something from side to side, which is completely unrelated to the ability to breathe with a stuffy nose.

Correct Answer: B

Rationale: The correct answer is B: 'Swift.' Precipitous is used to describe something that is steep, sheer, or done suddenly and without careful consideration. For example, a precipitous drop in the stock market. 'Slow' (Choice A), 'Gradual' (Choice C), and 'Delayed' (Choice D) do not align with the meaning of precipitous and are therefore incorrect.

Correct Answer: A

Rationale: The correct answer is 'dilate.' Eye drops are used to dilate the pupils, meaning to widen or enlarge them, which is necessary for an eye exam to allow more light to enter the eye. 'Constrict' (choice B) means to make smaller, which is the opposite effect needed for an eye exam. 'Enlarge' (choice C) is similar in meaning to dilate but is not the correct term used in this context. 'Decrease' (choice D) means to make less or reduce, which is also the opposite of what is required for an eye exam.

Correct Answer: B

Rationale: The correct answer is B: Misgivings. Trepidation means a feeling of fear or apprehension. In this context, the student observed the procedure with a certain amount of trepidation, indicating that they were feeling uneasy or fearful. Choices A, C, and D are incorrect. Confidence (choice A) is the opposite of trepidation, as it denotes a feeling of self-assurance. Fear (choice C) is the closest synonym to trepidation, making it an attractive distractor, but it is not the correct answer. Doubt (choice D) is different from trepidation, as doubt refers to a feeling of uncertainty or lack of conviction, not necessarily fear or apprehension.

Correct Answer: B

Rationale: The correct answer is B: 'Able to be heard.' Audible refers to something that can be heard. Choice A, 'Impossible to hear,' is the opposite of the meaning of audible. Choice C, 'Visible,' is unrelated as it pertains to sight, not hearing. Choice D, 'Silent,' is also not correct as it refers to the absence of sound, which is different from something being able to be heard.