单项选择题

You can come and see me() you run into difficulty.

A. some time
B. in time
C. whenever
D. whether

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单项选择题
--I He never drinks milk, does he-- ().

A. Yes, he drinks
B. Yes, he doesn't
C. No, he does
D. No, he doesn't
单项选择题
Since you are a little tired, you had better () a rest.

A. to stop to have
B. stop to have
C. to stop having
D. stop having
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