You look so tired. You______have stayed up late again.
A．shouldB．canC．mayD．must
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Mary _________be late, so don’t wait for her.
A．wouldB．canC．shouldD．may

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If I _______ it, I would do it in a different way.
A．were to doB．doC．had doneD．was to do

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科目：高中英語 來源：不詳 題型：單選題


You’ll have plenty of time tomorrow, so you         work too late tonight．
A．don’t have toB．mustn’tC．cannotD．shouldn't

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科目：高中英語 來源：不詳 題型：單選題


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— He ____ be glad to. He never refused our request.
A．canB．mustC．mayD．should

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科目：高中英語 來源：不詳 題型：單選題


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A．should have failedB．could have failed
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科目：高中英語 來源：不詳 題型：單選題


There is no night on. They _____ be at home.
A can’t    B mustn’t    C needn’t   D shouldn’t

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科目：高中英語 來源：不詳 題型：單選題


1don’t search my book case for your CD-player! Just look where it __ be   in the drawer, in your schoolbag, or somewhere else like that.
A．mayB．canC．mustD．will

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