—Why did you plant so many trees? — the environment.A. Improve B. To Improve C. Improved

发布时间：2020-08-22 15:15:36

—Why did you plant so many trees?
—      the environment.
A. Improve
B. To Improve
C. Improved
D. Improving

网友回答

A. Improve
(答案→)B. To Improve
C. Improved
D. Improving
解析：从题干的含义可知此句的含义是为什么栽那么多的树？为了保护环境。其中涉及到动词的不定式，做目的状语。故选B。
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