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

问题补充：

--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

答案：

A. used to being

(答案→)B. used to be

C. was used to be

D. 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。