单项选择题

The workers ______ a new hospital since the end of last year.

A. have built
B. have been building
C. had built
D. were building
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单项选择题
We insisted that he ______ badly wounded and that a doctor ______ for at once.
A. should be... should be sent
B. was... be sent
C. were... should be sent
D. was... must be sent
单项选择题
He spend the whole evening at home, ______ .
A. written a composition
B. write a composition
C. writing a composition
D. to write a composition
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