yesterday i was just about to go out -- someone telephoned me A,W_英语解答

yesterday i was just about to go out -- someone telephoned me A,When B,while c,as 选哪个,为什么

人气：336 ℃　时间：2019-10-23 03:31:04

解答

A
一个固定的句式,be about when,意思是正准备干什么,突然怎么了