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