I was just leaving the classroom ___ it rained.

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I was just leaving the classroom ___ it rained.
A.while B.when C.at D.during
A,B,C,D中该选哪个?为什么?他们之间的区别是什么?各个词语的意思又是什么?

选B（just leaving 就表示是在走的时候刚好发生了什么,则用when,意思是：在我离开教室的时候刚好下雨了.意思的话,前两个的意思基本相同,都是当……时候的意思,第3个则有多重意思 ,多表达在（某地点）during是在这(一段时间)之间,而when和while的区别则是:while修饰瞬间性动词,when修饰从句后或延续性动词）

I was just leaving the classroom ___ it rained. I was just leaving the classroom _____ it rained. 1.I was just leaving the classroom_____it rained Just as I was leaving the house,it ______ to me that I had f I was in the classroom just now. The phone _______(ring)just as I was leaving. i was just leaving my office_________ the telephong began to just as I was leaving,the phone rang again How was the weather yesterday It was terrible ,It rained ___ Your letter came just as I ___ my office A.was leaving B.lef It rained when i was ___（walk） home yesterday evening. I was in the classroom just now.(改为一般疑问句,对in the classroom 提