We must do everything we can ________ ou...

We must do everything we can ________ our earth cleaner and safer.

A. made B. to making C. make D. to make

D 【解析】试题根据语境可知此句的含义是我们必须竭尽全力来让我们的地球更清新更安全。本句中的we can作everything的定语，本题考查的是动词不定式做目的状语。故选D。

考点分析：

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