I was about to leave the officean unexpected visitors came.A. whileB. asC. whenD. before

发布时间：2020-08-16 09:47:03


I was about to leave the office    an unexpected visitors came.
A. while
B. as
C. when
D. before

网友回答

A. while
B. as
(答案→)C. when
D. before
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