◎ 题干
---It’s difficult for the villagers to cross the river.
---I think a bridge______ over the river.
A.should be builtB.is being builtC.has been builtD.was built
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“---It’s difficult for the villagers to cross the river. ---I think a bridge______ over the river.A.should be builtB.is being builtC.has been builtD.was built…”主要考查了你对  【被动语态】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。