a lot of trees in this area, but now we can see a museum instead.A. There used to haveB. T

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A. There used to have
(答案→)B. There used to be
C. There used to having
D. There used to being
解析：此题重点考查be used to doing sth和used to do sth 两个句型结构的区别和意义。前者是习惯做某事，后者表示过去常常做某事，现在不做了。