We were going out for a walk it began to rain.A. whileB. beforeC. asD. when

发布时间：2020-08-16 23:21:34

We were going out for a walk      it began to rain.
A. while
B. before
C. as
D. when

网友回答

A. while
B. before
C. as
(答案→)D. when
解析：考查固定句型。固定句型：Be doing sth when…正要做某事，在这时（发生意料之外的事情）。When在…那时（并列连词）。句意;我们正要出去散步，在这时开始下雨了。故D正确。
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