He was about to leave his office ____ it started to rain.A,when B,while C,as D,then

问题描述:

He was about to leave his office ____ it started to rain.
A,when B,while C,as D,then

答案:A when翻译:他正要离开他办公室,就在这时开始下雨了.此题考查when的一个特殊用法.1.when不但可以做从属连词引导时间状语从句,翻译为“当...时候”;而且它可以做并列连词引导并列句,此时when = and then,意思...