题目内容
【题目】It's difficult to get to the other side of the river. Maybe a bridge ________ over it.
A.should be builtB.should buildC.has builtD.has been built
【答案】A
【解析】
略
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题目内容
【题目】It's difficult to get to the other side of the river. Maybe a bridge ________ over it.
A.should be builtB.should buildC.has builtD.has been built
【答案】A
【解析】
略