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1.-----Could I borrow your dictionary?

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1.-----Could I borrow your dictionary?
------Yes,of course you ____.
A.might B.will C.can D.shall
2.----May I return the book now?
----No,you ____.You____that before the deadline.
A.mustn't,should to B.needn't,should have done C.may not,should do
D.can't,should have done
3.You're _____ your time trying to persuade him,he'll never join us.
A.speading B.wasting C.using D.missing
4.----Who is the boy over there?Is it John?
----No,it ___ be him.John is much taller.
A.mustn't B.wouldn't C.don't have to D.can't
1.-----Could I borrow your dictionary?
1、can解析:句子中could只是can的委婉形式,回答时要用原来的,即can
2、B.解析:.----May I return the book now其实就是can i.的意思,用may表委婉.意思是,我现在可以还书么?回答时,不,你不必,到期还就行.mustn't只表示禁止一个意思,can't,意思是不能,表示1-能力不够,所以不能;2-心里不愿意,所以不能;3-表猜测,意思是不可能.should have done这里should也是shall的委婉表达,意思是“可以”.
3、 B.wasting 由句意可知,该句意思是:你别浪费时间了,他是不会加入我们的.
4、D.can't解析:见第二题.can 3-表猜测,意思是不可能.