I( )leave when the telephone rang.Awas going to Bwas to Cwas about to Dwill

题目

I( )leave when the telephone rang.Awas going to Bwas to Cwas about to Dwill

答案

应该是选C吧
首先排除D
A通常不这样用 而用I was leaving when the telephone rang.
B be to 表示计划、打算做某事或者是命中注定做某事.一般表示将来的某些计划,后面可以加上时间限制的状语,如next week,next Friday等
C was about to 多指马上要做某事,即将做某事,不能与表示明确时间的短语搭配
was about to……when……是个固定搭配,这里when是个并列连词,可以理解为at that time
关于这题我的理解为,就在我要出门的那个时间点上,电话响了.我觉得我马上要出门这里的语境最符合,C恰好表示即将,马上的意思.
I was about to leave and at that time the telephone rang.