keep 当意思为保持环境卫生整洁时 用 keep
keep clean是常用的词组
单项选择
单项选择
The earth is our house.We must _____ the land,air and water clean.
A .change B.let C.stay D.keep
The earth is our house.We must _____ the land,air and water clean.
A .change B.let C.stay D.keep
英语人气：828 ℃时间：2020-03-26 04:58:35
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