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- 21Cars play an important role in modern life, but they ______ also cause many problems like air pollution.
A.should
B.can
C.must
D.will
开始考试练习点击查看答案 - 22I _____ have watched that movie --- it'll give me horrible dreams.
A.couldn't
B.needn't
C.shouldn't
D.mustn't
开始考试练习点击查看答案 - 23—Jenny,how did your math exam go? —I thought I ________,but in fact I came in the top 10% in the class.
A.mighthavefailed
B.couldn'thavefailed
C.shouldhavefailed
D.mustn'thavefailed
开始考试练习点击查看答案 - 24You_____ all those calculations! We have a computer to do that sort of thing.
A.needn'thavedone
B.mustnothavedone
C.shouldn'thavedone
D.cannothavedone
开始考试练习点击查看答案 - 25My car is covered with thick snow and now the engine simply ______ start.
A.can't
B.mustn't
C.won't
D.shan't
开始考试练习点击查看答案 - 26John, look at the time. __________ you play the piano at such a late hour?
A.Must
B.Can
C.May
D.Need
开始考试练习点击查看答案 - 27--Guess what! Tan Weiwei failed in the last round of the Super Girl Contest. ---How _______ it be? She is second to none in singing in my opinion.
A.shall
B.might
C.can
D.must
开始考试练习点击查看答案 - 28What he said at the meeting made Mary rather embarrassed, so he felt that he ______ differently.
A.mightexpress
B.shouldexpress
C.couldhaveexpressed
D.musthaveexpressed
开始考试练习点击查看答案 - 29— Mary looks hot and dry. — So ________ you if you had a high fever.
A.could
B.would
C.may
D.must
开始考试练习点击查看答案 - 30—There aren't any toys in our suitcase.Where have you put them? —Oh, no.That old lady sitting next to us ______ have taken ours by mistake.
A.must
B.could
C.should
D.would
开始考试练习点击查看答案
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