题目内容


30. Even if you are an experienced teacher, you sometimes ____ make some mistakes.
A．canB．mustC．should D．Will
A
略
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She is already two hours late. What _________to her?
A．can have happenedB．must have happened
C．should have happenedD．must happen
---Don’t forget to take your cell phone.
---But it’s just been announced that no students       bring cell phones to school.
A．shallB．mayC．canD．will

78. --- You _____ repay this debt this week according to the agreement.
--- Don’t worry. I _______ pay it off before the deadline.
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15. --- Who are the teenagers gathering at the school gate?
--- Well, if you _____ know, they are all my visiting students.
A．needB．mustC．mayD．Will

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A．needB．canC．mustD．Should

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negative effects on their family, friends and school work , according to a new study.
A．couldB．shouldC．needD．Would

31．Every solid object______reflect a sound，varying according to the size and nature of the object．
A．mustB．shallC．will D．Should
Sir, you ______be sitting in this waiting-room. It is for women and children only.
A．oughtn’t toB．can’tC．won’tD．needn’t

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