单项选择题

My sister met him at the Grand Theatre yesterday afternoon, so he ______ your lecture.

A. couldn't have attended
B. needn't have attended
C. mustn't have attended
D. shouldn't have attended
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The workers ______ a new hospital since the end of last year.
A. have built
B. have been building
C. had built
D. were building
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
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