_____twice a year, whether it is a car or a bus or a truck, is the rule that every driver must obey in this city.

       A. Examining        B. Examined          C. Being examined        D. Having been examined

        twice a year, whether it is a car or a bus or a truck, is the rule that every driver must obey in this city.

        twice a year, whether it is a car or a bus or a truck, is the rule that every driver must obey in this city.

A．Examining         B．Examined          C．Being examined     D．Having been examined

_______ twice a year, whether it is a car or a bus or a truck, is the rule that every driver must obey in this city．

    A．Being examined                       B．Examining       

    C．Examined                             D．Having been examined

________ twice a year, whether it is a car or a bus or a truck, is the rule that every driver must obey in this city.

              A. Examining                                           B. Examined         

C. Being examined                                    D. Having been examined

________ twice a year, whether it is a car or a bus or a truck, is the rule that every driver must obey in this city．      

       A．Examined        B．Examining        C．Being examined    D．Having been examined

____twice a year, whether it is a car or a bus or a truck, is the rule that every driver must obey in this city

1. A.
   Examining
2. B.
   Examined
3. C.
   Being examined
4. D.
   Having been examined

       twice a year, whether it is a car or a bus or a truck, is the rule that every driver must obey in this city．

       A．Examining       B．Examined C．Being examined       D．Having been examined

_______ twice a year, whether it is a car or a bus or a truck, is the rule that every driver must obey in this city.

A. Being examined                       B. Examined        

C. Examining                            D. Having been examined