----- Nội dung dịch tự động từ ảnh ----- Johnny said to his mother, "I don't know how to do this axercise." "We are waiting for the school bus", said the chidren. Marry said, "My father died a year ago". → 13. John said, "I have finished studying my lesson". → 14. Mary said, "I can not go to the movies with you, John". → 15. "I shall expect to see you next Wednesday." Mary said to her friend. → 16. He said, "I don't know what happened." 17. She said, "I went to the doctor yesterday." 18. He said, "I have a toothache." 19. She said, "I'll write him a prescription." 20. They said, "We're going to the drugstore." 6. He said, "The doctor gave me some pills." 7. She said, "I go to the supermarket every day." 10. → 11. → 12.