--Do you remember there a river here?- Of course, I often swam in it when I was young.

--Do you remember there a river here?
--- Of course, I often swam in it when I was young.
A. used to being
B. used to be
C. was used to be
D. was used to being

A. used to being(答案→)B. used to beC. was used to beD. was 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。

好好学习下