题目内容
---It’s difficult for the villagers to cross the river.
---I think a bridge______ over the river.
A.should be built |
B.is being built |
C.has been built |
D.was built |
A
【解析】本题考查的是情态动词的被动语态,其结构为主语+情态动词+be+动词过去分词,故选答案为A
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