Question

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

A. keep B. kept C. to keep D. keeping

Answer 1

【答案】C

【解析】试题分析：句意：为了组织废水流进河里，我们必须做我们能做的一切事情。to keep waste water from running into rivers.表示目的，we can，后省略了do，做everything的定语，故选C。