单项选择题

The country has already sent up three unmanned spacecraft, the most recent ______ at the end of last May.

A. has been launched
B. having been launched
C. being launched
D. to be launched
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单项选择题
It's high time that you ______ working.
A. stopped
B. had to stop
C. shall stop
D. stop
单项选择题
Anyone in his position ______ the same.
A. would do
B. would have done
C. will do
D. will have done
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