—What a great cook your sister is! —Yeah! We ______ never have enough of her cookies.
#89016
A
may
B
must
C
should
D
can
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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