I didn't know who____the window?A had broken B.broke

来源：学生作业帮助网编辑：作业帮时间：2024/11/16 08:21:07

I didn't know who____the window?A had broken B.broke
I didn't know who____the window?A had broken B.broke

I didn't know who____the window?A had broken B.broke
A.过去某一时刻已经发生的,用过去完成时