Question

【题目】-- It's difficult for the village children to cross the river for school.
-- I think a bridge ________ over the river.
A.should be built
B.is being built
C.has been built
D.was built

Answer 1

【答案】A
【解析】句意：——对于村子里的孩子们来说过河去上学很困难。——我认为在河上面建一座桥。bridge与build之间构成被动关系。A.应该被建；B.正在被建；C.已经被建；D.（过去）被建。根据句意故选A。