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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 dumpB.is used to dumpC.used to dumpingD.is used to dumping

A

解析试题分析:be used to sth习惯于某事;used to do sth过去常常做某事. sth be used to do sth某物被用来做某事。句意:这个工厂过去常常把废水泄入河中,但是现在它用一种新方法处理废水.结合语境可知选A.
考点:used的用法
点评:used to的用法比较固定,需要注意的是used to do表示过去常常做某事,be used to表示习惯于某事。前者to是不定式符号,后接动词原形。后者to是介词,后接名词或者名词性短语。Used to do结构中use相当于行为动词,有词形变化。Be used to中used相当于形容词,无词形变化。

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