Question

这道英语选择题为什么选D？

That every vehicle, whether it is a car, a bus or a truck, must _____ twice a year driver must obey in this city.
A.examing B. examined C. having been examined D. be examined

为什么选D呢，麻烦详细解答下

Answer 1

主语every vehicle 与动词examine是被动的关系。这道题是情态动词的被动语态 ,结构为; 情态动词+be+过去分词

Answer 2

被动语态啊。主语是 every vehicle与examin是被动关系。

Answer 3

车辆要 被 检验 （1年两次）

Answer 4

must后加动词原形……

Answer 5

vehicle是examine的宾语，现在宾语作了主语，要用被动语态
所有车辆，无论是轿车、巴士还是货车，都须一年进行两次车检。本市司机须遵守此规定。

Answer 6

被动语态，又因为must所以用be