Mr White his racing bicycle by himself yesterday, but I’m not sure whether it is ready
A. repaired
B. had repaired
C. was repairing
D. would repair
网友回答
A. repaired
B. had repaired
(答案→)C. was repairing
D. would repair
解析：考查时态：句意：怀特先生昨天自己修自行车，但是我不确定现在是不是修好了。因为时间是yesterday，排除BD项，又因为but I’m not sure whether it is ready这句话，排除A。因为一般过去时，表示动作已经结束了，就不会说不知道有没有准备好，用过去进行时表示过去正在做的动作。选C。