sweep打扫吧
选C
keep +形容词
这里只有C
We should sweeo the floor three times a day in order to keep the classroom()
We should sweeo the floor three times a day in order to keep the classroom()
A cleaning B cleanest
C clean D cleans
A cleaning B cleanest
C clean D cleans
英语人气：611 ℃时间：2019-11-05 08:49:52
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