Every one of us should keep the classroom___every day.
A.clean b.cleaned c.cleaning d.to clean
为什么不是C?Keep doing=一直保持在某个状态
人气：410 ℃ 时间：2020-01-29 10:30:41
解答
A.clean
这里clean是干净的意思.keep sth +形容词 keep sb.+doing
keep the door open/ closed keep me waiting keep the students cleaning the classroom.
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