单项选择题

Unpleasant symptoms can cause the smoker to resume smoking to raise the levels of nicotine in the blood.

A. let down
B. go about
C. drop off
D. return to
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单项选择题
There is a weird power in a spoken word, Joseph Conrad once said.
A. mighty
B. prospective
C. odd
D. formidable
单项选择题
A. He has trouble finishing the assignment. B. He is not content with the current professor. C. He finds extremely difficult learning Spanish. D. He’s trying to find a teacher who is not too strict.
A. He has trouble finishing the assignment.
B. He is not content with the current professor.
C. He finds extremely difficult learning Spanish.
D. He’s trying to find a teacher who is not too strict.
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