I _______________ the office when the telephone rang.

问题描述:

I _______________ the office when the telephone rang.
A.was about to leave B.would leave C.left D.was to leave
选哪个为什么?

A.was about to leave
表示即将发生的动作,在时间上指最近的将来.如:
We are about to start.我们就要出发了.