In order to reduce the increasing prices of vegetables the toll(过路费)if a truck carrying

问题补充：

In order to reduce the increasing prices of vegetables , the toll(过路费)if a truck carrying them passes through a toll station .

A. cancels

B. is cancelled

C. was cancelled

D. had been cancelled

答案：

A. cancels

(答案→)B. is cancelled

C. was cancelled

D. had been cancelled

解析：考察时态及语态。句意：为了降低蔬菜正在升高的价格，当通过收费站时运菜的卡车的过路费被取消了。描述的是现在的一种客观状态，过路费是动作的对象，故用被动语态，一般现在时态，选B。