There ______ a hospital. But it is a school here.

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问题 There ______ a hospital. But it is a school here.

选项 A、used to be
B、used to have
C、used to do
D、was used to have

答案A

解析 used做动词讲时有“过去常常”的意思,习惯用法为used to do,通读全句可知:这过去是座医院,现在却是一座学校。很明显B项、C项和D项都不符合题意。
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