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The factory ______ its waste into the river, but now it deals with the waste in a new way.

A.used to dump      B.is used to dump     C.used to dumping    D.is used to dumping

 

【答案】

A

【解析】

試題分析:be used to sth習慣于某事;used to do sth過去常常做某事. sth be used to do sth某物被用來做某事。句意:這個工廠過去常常把廢水泄入河中,但是現在它用一種新方法處理廢水.結合語境可知選A.

考點:used的用法

點評:used to的用法比較固定,需要注意的是used to do表示過去常常做某事,be used to表示習慣于某事。前者to是不定式符號,后接動詞原形。后者to是介詞,后接名詞或者名詞性短語。Used to do結構中use相當于行為動詞,有詞形變化。Be used to中used相當于形容詞,無詞形變化。

 

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