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4.May I watch TV for another 15minutes,Mum?
Oh,dear,if you _____.(  )
A.canB.mustC.mayD.should

分析 --妈妈,我能再看15分钟电视吗?
--哦,亲爱的,如果你一定要看的话.

解答 答案是B.本题考查情态动词辨析;can能够;must必须,(用于表示意图)一定要,坚持要;may也许,可以;should应该;根据语境判断,妈妈希望不要再看电视了,但是"如果坚持"要看的话,可以看.所以答案选择B.

点评 要在正确理解情态动词的基本含义的基础上,整体理解语境中的情感态度,做出合理的判断.

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