◎ 题干
-It's difficult for the village children to cross the river for school.
- I think a bridge _________ over the river.   
[     ]
A. was built    
B. is being built  
C. should be built  
D. has been built
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“-It's difficult for the village children to cross the river for school. - I think a bridge _________ over the river. [ ]A. was builtB. is being built C. sh…”主要考查了你对  【被动语态】【现在完成时】  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。