单项选择题

We are at your service. Don't （）to turn to us if you have any further problems.

A. beg
B. hesitate
C. desire
D. seek

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单项选择题
According to statistics, a man is more than twice as likely to die of skin cancer（）a woman.

A. than
B. such
C. so
D. as
单项选择题
Some people who don't like to talk much are not necessarily shy; they （）just be quiet people.

A. must
B. may
C. should
D. would
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