The road was muddy. It____ last night.
A. must rained
B. must have rained
C. must be rained
D. could have rained
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She can speak quite fluent English. She____.
A. must been in the U.S.for some time
B. must have been in the U.S.for some time
C. should have been in the U.S.for some time
D. May be in the U.S.for some time
You should bear in mind that he is not so strong as he____.
A. was used to be
B. used to be
C. was used to
D. use to
“We didn't see him at the exhibition yesterday.”“He ___it.”
A. mustn't visit
B. can't have visited
C. should have gone to see
D. may see
Mary ____my letter, otherwise she would have replied before now.
A. should have received
B. has received
C. couldn't have received
D. ought to have received
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