单项选择题

The government ______ best to boost production.

A. are doing its
B. is done its
C. are done their
D. is doing its
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单项选择题
In the room ______ a chair, a table, and a bed.
A. there have
B. there is
C. there are
D. there was
单项选择题
The young in spirit ______ the vital forces in our society.
A. is
B. are
C. has been
D. have been
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