twice a year whether it is a car a bus or a truck is the rule that every driver must

问题补充：

twice a year, whether it is a car, a bus or a truck, is the rule that every driver must obey in this city.

A. Examining

B. Examined

C. Having been examined

D. Being examined

答案：

A. Examining

B. Examined

C. Having been examined

(答案→)D. Being examined

解析：考查动名词做句子的主语。句意：五路是汽车，公交车还是卡车，两年被检查一次是这个城市里所以的司机都要遵守的规则。本题中的being examined是一个动名词的被动形式做句子的主语。故D项正确。