chuyển thành câu bị động
----- Nội dung dịch tự động từ ảnh -----
17. They are sweeping the streets....
18. The mailman had already delivered the mail..
19. He used to borrow my pen....
20. He had to finish his work on time...
21. You needn't do all the homework..
22. You ought to tell him early.........
23. They don't use the room very often.....
24. They must widen the road to school this year.
25. Have you done your homework?..
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26. Did you finish your work early?...
27. She has to pick fruit very early in the morning.....
28. The house was dirty because she hadn't cleaned it for weeks.....
29. She is taking care of the baby girl..........
30. Children should treat old men with respect......