◎ 题干
There ________ a pool, but now there stands a tall building instead.          
[     ]
A. used to be              
B. used to has                
C. use to be
◎ 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“There ________ a pool, but now there stands a tall building instead.[ ]A. used to be B. used to hasC. use to be…”主要考查了你对  【一般过去时】【therebe句型】  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。