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Let’s plant trees the air clean. ( )A.keepingB.keepC.to keepD.keeps

编辑:chaxungu时间:2026-04-11 01:02:11分类:小学英语题库

【题目】Let’s plant trees________the air clean. ( )

A.keepingB.keepC.to keepD.keeps

【答案】C

【解析】