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7.-He should have come to join in the thorough cleaning.
-He         .I don't think it was his turn.(  )
A.needn't have toB.needn't haveC.didn't have toD.doesn't need to

分析 --他本应该来参加这次大扫除.
--他没有必要.我认为没有轮到他.

解答 答案是C.本题考查情态动词的区别.A项中needn't表示"不必";have to 表示"不得不",其否定式don't have to 等于needn't; needn't 不与have to 连用;B项needn't have是needn't have come的省略,表示"本不必做但实际上却做了";C项didn't have to 等于didn't need to do表示"过去没有必要做事实上也没有做";D项doesn't need to do 表示"现在或将来没有必要做";根据句意可知,他没有来参加大扫除,并且回答的人认为也没有必要来,所以答案是C.

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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