You ___ do it even if you don"t want to. [ ]A. can"t B. mustn"t C. have to

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You ___ do it even if you don"t want to. [     ]
A. can"t
B. mustn"t
C. have to
D.needn"t

答案

举一反三

—Why didn"t you answer the phone last night?
—I ___ when you called. [     ]
A. had to slept
B. must have been sleeping
C. have to be sleeping
D. must have slept

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—Shall we go skating or stay at home?
—Which ___ do yourself? [     ]
A. do you rather
B. would you rather
C. will you rather
D. should you rather

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We can"t blame John for the mistake. He wasn"t here when we decided what to do, so he ___ about the
plan.[     ]
A. wasn"t know
B. was known
C. can"t be known
D. couldn"t have known

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We knocked at the door so that we ___be allowed to stay for the night. [     ]
A. must
B. may
C. might
D. can

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— He hasn"t finished the work up to now.
—Well, he____. [     ]
A. ought have
B. should have
C. ought to
D. should

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