When I picked up my book I found that the cover ha...

Câu hỏi: When I picked up my book I found that the cover had been torn.

A. Picking up my book, the cover had been torn.

B. On picking up the book, I saw that the cover had been torn.

C. Picked up, I saw that the cover of the book was torn.

D. The cover had been torn when my book picked up.