◎ 题干
—Why did you plant so many trees?
— ______ the environment.
A.Improve
B.To Improve
C.Improved
D.Improving
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据n多题专家分析,试题“—Why did you plant so many trees? — ______ the environment.A.Improve B.To Improve C.Improved D.Improving…”主要考查了你对  【不定式】【分词】【动名词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。