It’s difficult for the village children to cross the river to get to school. We think a br

问题补充：

It’s difficult for the village children to cross the river to get to school. We think a bridge over the river

A. was built

B. should be built

C. has been built

D. is being built

答案：

A. was built

(答案→)B. should be built

C. has been built

D. is being built

解析：句意：对于这个村庄的孩子们来说，过河去上学很困难。我们考虑应该在这条河上面建一座桥。结合语境可知下文宾语从句是对将来状态的虚拟，故用过去式助动词should，从句主语a bridge是动作对象，故用被动语态。