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        1. 【題目】We must do everything we can waste water from running into rivers.

          A.keepB.keptC.to keepD.keeping

          【答案】C

          【解析】

          試題句意:為了組織廢水流進(jìn)河里,我們必須做我們能做的一切事情。to keep waste water from running into rivers.表示目的,we can,后省略了do,做everything的定語,故選C。

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