This piece of information has not been made public yet．You ______ never mention it to anyone else．

试卷相关题目

• 1I made some mistakes in the exam．I ______ my spelling very carefully, but I didn't do so．

  A.must have checked

  B.couldn't have checked

  C.should have checked

  D.might have checked

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• 2We ________ keep a cool head on over--heating development, for it ____ have negative influence upon national economy.

  A.should; must

  B.must; would

  C.might; could

  D.must; may

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• 3Mr. Baker, a number of students want to see you. _______ they wait here or outside?

  A.Should

  B.Will

  C.Could

  D.Shall

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• 4It's raining so hard. She ________ be playing on the playground.

  A.needn't

  B.may

  C.ought to

  D.can't

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• 5John ________phone you. You 'd better stay here for some time.

  A.can't

  B.mustn't

  C.may not

  D.might

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• 6How much money, ________, have you paid for this flat?

  A.I can ask

  B.I must ask

  C.shall I ask

  D.may I ask

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• 7No one ________ into the cave without light.

  A.dares go

  B.dare go

  C.dare to go

  D.dared going

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• 8Had she been older, she ________ it better.

  A.had done

  B.might have done

  C.might do

  D.would do

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• 9The climbers ______ reach the top of the mountain, but because of the sudden snowstorm, they ______ come down．

  A.could ;weren't able to

  B.were able to ;couldn't

  C.could ;couldn't

  D.were possible to ;couldn't

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• 10Black holes ________ not be seen directly，so determining the number of them is a tough task．

  A.can

  B.will write

  C.must

  D.need

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