单项选择题

A number of the students in our school （）sent to work in Tibet.

A. are
B. is
C. have
D. has

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单项选择题
There is little we can do about it, （）

A. is there
B. can’t we
C. isn’t there
D. can we
单项选择题
Only time will tell if we （）

A. had been succeeded
B. have been success
C. had been successful
D. have been successful
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