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科目： 來源：不詳 題型：單選題


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： 來源：不詳 題型：單選題


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： 來源：不詳 題型：單選題


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： 來源：不詳 題型：單選題


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

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科目： 來源：不詳 題型：單選題


. --- 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： 來源：不詳 題型：單選題


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： 來源：不詳 題型：單選題


---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： 來源：不詳 題型：單選題


--- 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： 來源：不詳 題型：單選題


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： 來源：不詳 題型：單選題


―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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