Mr.Liis busy _some important work in his office.nowAat b.for c,wi_英语解答 - 作业小助手

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Mr.Liis busy _some important work in his office.nowAat b.for c,with选?why

人气：175 ℃　时间：2019-08-21 13:10:48

解答

c
这是busy的固定用法：be busy with sth.
即忙于某事
另有be busy doing sth.
即忙于做某事

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