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

问题补充：

a lot of trees in this area, but now we can see a museum instead.

A. There used to have

B. There used to be

C. There used to having

D. There used to being

答案：

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。