-Who broke the window?---.A. I foundB. I didC. I findD. I do

问题补充：

---Who broke the window?---.

A. I found

B. I did

C. I find

D. I do

答案：

A. I found

(答案→)B. I did

C. I find

D. I do

解析： did代替前面的broke the window