问题
选择题
In order to reduce the increasing prices of vegetables, the toll____ if a truck carrying them passes through a toll station.
A.has cancelled
B.is cancelled
C.was cancelled
D.had been cancelled
答案
答案:B
考察时态,句意:为了降低蔬菜价格,如果一辆装有蔬菜的卡车经过收费站,收费被取消了。可知该句叙述的是一个客观存在的事实,过去产生,今后还将进行下去的一个客观事实,故用一般现在时态。选B。