—Whose shirt is this?—It ______ be Li Lei’s. It is too big for him.
#74370
A
could
B
must
C
might
D
can’t
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There’s still an hour left, you _____ go in a hurry. 
#74519
A
must
B
needn’t
C
can
D
mustn’t
----Must I finish the jod at seven o’clock?----No, you___________
#62954
A
mustn’t
B
can’t
C
needn’t
D
don’t have
Mary ______ my letter; otherwise she would have replied before now. 
#63420
A
has received
B
ought to have received
C
couldn’t have received
D
shouldn’t have received