We can"t blame John for the mistake. He wasn"t here when we decided what to do,

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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

答案

举一反三

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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—When can I come for the photos? I need them tomorrow afternoon.
—They _____ be ready by 12:00. [     ]
A. can
B. should
C. might
D. need

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— I stayed at a hotel while in New York.
—Oh, did you? You ___ with Barbara.[     ]
A. could have stayed
B. could stay
C. would stay
D. must have stayed

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—Will you stay for lunch?
—Sorry, ___. My brother is coming to see me. [     ]
A. I mustn"t
B. I can"t
C. I needn"t
D. I won"t

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