◎ 题干
--- It’s difficult for the village children to cross the river for school.
--- 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 village children to cross the river for school.--- I think a bridge _______ over the river. A.should be builtB.is being builtC.has …”主要考查了你对  【一般现在时】【过去进行时】【过去完成进行时】  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。