单项选择题

If he can ______ smoking for months, his health will improve.

A. keep up
B. keep up with
C. keep off
D. keep from
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单项选择题
I waited half an hour for my friend, but he didn’t ______.
A. turn in
B. turn off
C. turn up
D. turn over
单项选择题
Pay attention ______ details
A. to
B. for
C. with
D. in
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