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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 --他本應(yīng)該來參加這次大掃除．
--他沒有必要．我認(rèn)為沒有輪到他．

解答 答案是C．本題考查情態(tài)動詞的區(qū)別．A項中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 不與have to 連用；B項needn't have是needn't have come的省略，表示"本不必做但實(shí)際上卻做了"；C項didn't have to 等于didn't need to do表示"過去沒有必要做事實(shí)上也沒有做"；D項doesn't need to do 表示"現(xiàn)在或?qū)頉]有必要做"；根據(jù)句意可知，他沒有來參加大掃除，并且回答的人認(rèn)為也沒有必要來，所以答案是C．

點(diǎn)評 要在正確理解情態(tài)動詞的基本含義的基礎(chǔ)上，整體理解語境中的情感態(tài)度，做出合理的判斷

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