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。