We were about to leave the classroom it began to rain.A. whileB. whenC. asD. before

发布时间：2020-08-14 23:57:48

We were about to leave the classroom      it began to rain.
A. while
B. when
C. as
D. before

网友回答

A. while
(答案→)B. when
C. as
D. before
解析： be about to do sth. when …正要干某事，这时…。
以上问题属网友观点，不代表本站立场，仅供参考！