问题 选择题

The key      the earth is to change the way      we live.

A.to save; /

B.to saving; /

C.to save; how

D.to saving; how

答案

答案:B

本题考查名词及定语从句。The key to doing sth.做某事的关键,to为介词;定语从句the way为先行词,关系词为that/in which/\,选B。

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