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
网友回答
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。