题目内容

Jone left there hours ago. She ______ home by now.

A. must has arrived
B. must arrive
C. must have arrived
D. can have arrived

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karen loves her cats. She ___ killed them.

A. must have
B. might not
C. might have
D. can't have

My brother thought it was a UFO. But I'm not really sure. It ____ a military plane or a weather balloon.

A. might have been
B. might be
C. must be
D. can be

Tom isn't answering his phone. He ______ shopping,or perhaps he's asleep.

A. can have gone
B. might have gone
C. has gone
D. might be going

I wonder why Tom isn't at work today. I suppose he ___ ill.

A. must be
B. mustn't be
C. can be
D. needn't be

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