从方框中选择合适的句子补全对话。

A. I was six years old. B. No, I couldn't. C. Come here, Lucy. D. Yes. But I'm tall now. E. Look! This is my photo.

Mary:

Lucy: OK.

Mary:

Lucy: How old were you then?

Mary:

Lucy: You were short before.

Mary:

Lucy: Could you run fast at that time?

Mary Now I can run and swim fast.