单项选择题

Our research has focused on a drug which is so （） as to be able to change brain chemistry.

A. powerful
B. influential
C. monstrous
D. vigorous

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单项选择题
We are （）faced with the necessity to recognize that having more people implies a lower standard of living.

A. readily
B. inevitably
C. smoothly
D. deliberately
单项选择题
Some people criticize family doctors for （）too many medicines for minor illnesses.

A. prescribing
B. advising
C. ordering
D. delivering
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