I had finished supper and have a bath when the power was cut off.A. was going to.B. was

问题补充：

I had finished supper and have a bath when the power was cut off.

A. was going to.

B. was about to.

C. was to.

D. would

答案：

A. was going to.

(答案→)B. was about to.

C. was to.

D. would

解析：考查时态。句中考查be about to do … when …正要做……突然……。句意：我刚吃完晚饭，准备洗澡的时候，突然停电了。