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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
考查used to的用法。句意“工厂过去常常把废水排进河里,但是现在,它用一种新的方法来处理废水。”used to do sth.“过去常常做某事”;be used to doing sth.“习惯于做某事”;sth. be used to do sth./for doing sth.“某物被用来做某事”;sth. be used as...“某物被用作......”。故选A。
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