The teacher commanded that the exercises       in an hour.
#87238
A
was finished
B
were finished
C
should finish
D
be finished
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— No wonder you caught a cold. You _____ out last night without a coat. — I know how silly I was. 
#87891
A
shouldn’t have gone
B
mustn’t have gone
C
couldn’t have gone
D
mightn’t have gone
—The woman biologist stayed in Africa studying wild animals for 13 years before she returned.—Oh, dear! She _______ a lot of difficulties!
#89683
A
may go through
B
might go through
C
ought to have gone through
D
must have gone through