问题
选择题
To solve the traffic problem, more and more bridges ____________ across the river every year.
A．were built
B．will build
C．are built
D．are building
答案
答案：B
题目分析：句意：为了解决交通问题，每年河上建上了越来越多的桥。每年桥是被建造的，所以要用一般现在时态的被动语态。故选B。