We were about to climb up to the top of the mountain it began to rain heavily.A. asB. wh

发布时间：2020-08-15 03:11:44

We were about to climb up to the top of the mountain      it began to rain heavily.
A. as
B. while
C. when
D. since

网友回答

A. as
B. while
(答案→)C. when
D. since
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