Being examined twice a year，whether it is a car or a bus or a truck，is the rule that every

Being examined twice a year，whether it is a car or a bus or a truck，is the rule that every driver obey in this city.
A. shall
B. can
C. ought to
D. need

(答案→)A. shallB. canC. ought toD. need解析：这题考查情态动词的用法，shall表示“规定，命令，警告等”句意是：不管汽车、公共汽车、或卡车，每年检查两次是这个城市每个司机要遵守的规则。选A。

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