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we must keep the classroom______- A.clean B.to clean C.cleaning D.cleaned
人气:320 ℃ 时间:2019-09-01 10:55:11
解答
A clean
keep sth. adj. 是保持某物怎么样的意思,如:keep fish fresh保持鱼新鲜,keep classroom clean 保持教室干净
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