单项选择题

He ordered that all the letters ______ at once.

A. send
B. be sent
C. were sent
D. sending
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单项选择题
A new doctor ______ the village in place of the one who had retired.
A. would be sent for
B. was being sent to
C. was sent to
D. was sent for
单项选择题
Do you know how the war ______
A. wins
B. won
C. was won
D. had been won
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