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

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

A. There used to have(答案→)B. There used to beC. There used to havingD. 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。

这下我知道了