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    科目： 来源：不详 题型：单选题

    Trees ____ fight air pollution．They are natural air conditioners．
    A．shouldB．mustC．needD．can

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    科目： 来源：不详 题型：单选题

    — Wow! You look different! You            wear glasses.
    — Yes, I did. But now I am wearing contact lenses(隐形眼镜).
    A．couldB．mustC．used toD．would

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    科目： 来源：不详 题型：单选题

    This book isn’t mine. ________can it be?
    A．what elseB．who elseC．which else’sD．who else’s

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    科目： 来源：不详 题型：单选题

    My uncle _________ drive a car two years ago. Now he drives very well.
    A．couldn’t
    		B．can’t
    		C．mustn’t
    		D．shouldn’t

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    科目： 来源：不详 题型：单选题

    --Is the man standing outside the teacher’s office Mr. Zhou?
    --No, it ______ be him. He has gone to Hong Kong for an academic conference.
    A．mustn’tB．can’tC．needn’tD．couldn’t

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    科目： 来源：不详 题型：单选题

    -- Can I tell Peter about the news?
    -- No, I don’t want anyone else to know it. You ________ keep it to yourself.
    A．mustB．needC．canD．may

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    科目： 来源：不详 题型：单选题

    ―Must I report the situation of the new company to the manager now?
    ―No, you         . You are tired and you can do it after you have a good rest.
    A．mustn’t B．needn’tC．shouldn’tD．can’t

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    科目： 来源：不详 题型：单选题

    —May I try on the jeans?
    —Yes, you        
    A．shouldB．canC．mustD．need

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    科目： 来源：不详 题型：单选题

    —Who’s that man under the tree? Is it Mr Black, our new English teacher?
    —It_______ be. Mr Black has gone to Shanghai for a holiday.
    A. mustn’t                                              B. can’t                                               C. needn’t

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    科目： 来源：不详 题型：单选题

    -- What will the weather be like tomorrow?
    -- It ______ be rainy, cloudy or sunny. Who knows?
    A．mustB．mightC．shallD．should

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