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    科目： 来源：不详 题型：单选题


    So far no life has been found outside the earth, but while some scientists are actively searching for living things in outer space, others firmly believe there ____ .
    A．mustn’t beB．may not beC．can’t beD．won’t be

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    科目： 来源：不详 题型：单选题


    If we had taken the other road, we ________ earlier.
    A．would arriveB．might arriveC．had arrivedD．might have arrived

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    科目： 来源：不详 题型：单选题


    You _____ be tired; you have been working for so long a time,
    but he _____ be tired; he has just begun to work.
    A．may not; must B．must; may notC．can’t; mustD．must; can’t

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    科目： 来源：不详 题型：单选题


    – Oh. I’ve just realized I haven’t got any money.
    --Well, don’t worry. I _____ you some.
    A．am about to lendB．will lendC．am going to lendD．am lending

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    科目： 来源：不详 题型：单选题


    . --- The company spent thousands of dollars to promote its new product.
    --- They _____: the world itself was more than ready to buy.
    A．shouldn’t have botheredB．needn't have bothered
    C．couldn’t have botheredD．mustn’t have bothered

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    科目： 来源：不详 题型：单选题


    The successful launch of Shenzhou VII must have immediately excited the Chinese, ____ it ?
    A．needn’tB．didn’tC．hasn’tD．mustn’t

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    科目： 来源：不详 题型：单选题


    ---Is there any flight to New York?
    --- I think there ______ be, for it is snowing so heavily.
    A．shouldn’tB．mustn’tC．can’tD．needn’t

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    科目： 来源：不详 题型：单选题


    --- What has happened to Alice ?
    --- I don’t know. She__________her job.
    A．can have lostB．may have lostC．should have lostD．need have lost

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    科目： 来源：不详 题型：单选题


    Her brother ______ be at home now, because he was seen playing basketball in the stadium just now.
    A．mustn’tB．needn’tC．can’tD．shouldn’t

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    科目： 来源：不详 题型：单选题


    ―We didn’t see Robert at the opening ceremony yesterday.                    
    ―No, he _______ it.
    A．mustn’t have attendedB．needn’t have attended
    C．needn’t attendD．didn’t need to attend

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