单项选择题

It turned out that the man was an excellent policeman working in New York, ______had contributed a lot to the case.

A. that
B. which
C. who
D. where
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单项选择题
It shames me to say it, butI told a lie when______at the meeting by my boss.
A. questioning
B. having questioned
C. questioned
D. to be questioned
单项选择题
Some people like drinking coffee, for it has______effects.
A. promoting
B. stimulating
C. enhancing
D. encouraging
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