—I wonder why Mr Green hasn't showed up at the meeting yet.—I'm not sure，but he________in a traffic jam driving here.
#62838
A
could be stuck
B
might have been stuck
C
might be stuck
D
must have been stuck
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—Why does Mary look so worried today?—I’m not sure, but she _____ a small accident driving here.
#62738
A
must have
B
might have
C
must have had
D
might have had
–Mom, may I go swimming with my friends in the river? –No, you _________. That’s too dangerous.
#76231
A
won’t
B
don’t
C
needn’t
D
mustn’t
Must we finish all the homework today or tomorrow? – You ____ worry about it. You may hand it in next week.
#74646
A
mustn’t
B
can’t
C
needn’t
D
shouldn’t
—Look! The boy in the white shirt ___be Tom. --It ____be him. I saw him enter the library just now.
#76568
A
must; can’t
B
must; mustn’t
C
may; shouldn’t
D
may; mustn’t