I was about to have a shower the telephone rang at the bedroom.A. asB. whenC. at the timeD

I was about to have a shower the telephone rang at the bedroom.
A. as
B. when
C. at the time
D. and

A. as(答案→)B. whenC. at the timeD. and解析：考查连词。本题考查be about to do … when …正在做……突然……，句意：群殴正要洗澡，突然卧室里的电话铃响了。

好好学习下