Being examined twice a year is the rule that every driverobey in the cityA. shall B. canC

问题补充：

Being examined twice a year is the rule that every driverobey in the city．

A. shall

B. can

C. ought to

D. need

答案：

(答案→)A. shall

B. can

C. ought to

D. need

解析：考查情态动词：句意：两年被检查一次是每个司机都必须遵守的规定。这里用shall表示规定，警告，命令等，can是有能力，ought to是按道理应该，need是需要，所以选A。