When I picked up my book I found that the cover had been torn65/80Mark the letter A, B, C or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions When I picked up my book I found that the cover had been tornPicked up, I saw that the cover of the book was tornPicking up my book, the cover had been tornThe cover had been torn when my book picked upOn picking up the book, I saw that the cover had been tornGiải thíchĐáp án là D. On + V-ing = When + S + V: Khi