问题
选择题
Mr. White his racing bicycle by himself yesterday, but I am not sure whether it is ready.
A．repaired
B．had repaired
C．was repairing
D．would repair
答案
答案：C
考查时态。根据后半句可知，“我”还不确定是否已经修好，说明昨天，怀特先生正在修理。故用过去进行时。故选C。