Ai làm giúp mk với, mk cần câu trả lời chính xác nhất nha ----- Nội dung dịch tự động từ ảnh ----- Bài 1: Chuyển các câu sau câu bị động ( Passive voice ) 15. They had waited for her for two hours before she came. 16. Tim had returned the book to the party. 17. He will buy the house next week. 18. All his friends will see him off at the airport. 19. They should help Jane with the sewing. 20. He can use this machine. 21. They may pay money tomorrow. 22. Employers must pay all the expenses for this training course. 23. They can't make tea with cold tea. 24. She has to finish this report tomorrow. 25. They have to buy more food in case their friends come. 26. He had to finish this plan earlier. 27. They used to drink beer a lot.