— Can you imagine what is Jack doing now? He is playing football outside while everyone else is busy in class!— He     his homework, I think.
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A
must have finished
B
must finish
C
can’t have finished
D
mustn’t have finished
推荐题目
Without electricity human life __________ quite different today. 
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A
is
B
will be
C
would have been
D
would be
You _____ an A on your composition, but there were some spelling mistakes.
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A
should receive
B
could have received
C
would receive
D
must have received
Were it not for the debt, we ______a happy life:
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A
are living
B
would live
C
were living
D
will live