题干

______________ 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.ExaminingB.Examined
C.Having been examinedD.Being examined
上一题 下一题 0.4难度 单项选择 更新时间:2013-04-10 09:40:28

答案(点此获取答案解析)