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1、The baby is asleep.You________make any noise.

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1、The baby is asleep.You________make any noise.
A.don't have to B.mustn't C.may not D.needn't
2、He_________.I saw him playing football on the playground just now.
A.must have fallen ill B.may have fallen ill C.can't have fallen ill D.should have fallen ill
3、If Mary left here at five,she________be home by now.
A.can B.must C.need D.will
4、You_________.There is plenty of time before the train arrives.
A.needn't hurry B.mustn't hurry C.wouldn't hurry D.won't hurry
5、I'm not sure if I'll go to Beijing for holidays,but I_________go.
A.must B.may C.need D.will
6、Amy did best in the English test.She________hard last week.
A.must have worked B.should have worked C.should work D.must work
1B,2C,3B,4A,5B,6A,1为祈使句,A为不得不,不符合,因为孩子在熟睡,CD为不可能和不需要,均不符合.2因为我看到他在打球,所以他不可能生病了,只有C符合题意,3must be为一定,其他不符合.4应为还有很多时间,所以不需要走很快.5前面说不确定,所以后面应该说可能去,其他不符合.6后面说last week为过去时,又是在谈过去发生的事,所以是完成时,所以只有AB符合,但A是说一定学习的很刻苦,符合意思,所以排除B.这几个题是考情态动词的用法,比较容易理解所以解释不太详细,见谅!详细了解请看http://wenku.baidu.com/view/27c6edf3f90f76c661371a16.html