> 英语 >
Mr.Liis busy _some important work in his office.nowAat b.for c,with选?why
人气:347 ℃ 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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