Viết lại câu cho nghĩa không đổi

giải hộ mik với mn mik tặng 10 điểm pls
----- Nội dung dịch tự động từ ảnh -----
20. I can't understand the lesson today because it is very difficult.
21. Who wrote it?
22. The postman cleans this box three times a day.
23. We serve meals until 23:00.
24. You don't repair this radio.
25. Quang usually does his homework at night.
26. I'll ask some one to paint my house blue.
27. I don't like people laughing me at my mistake.
28. Did anyone see you come in?
29. I want you to leave me alone.
30. Who wrote this book?
31. She likes me to write that report
32. The cook ought to have prepared it
33. It is your duty to do this work
34. Someone saw him pick up the gun.
35. Nobody has used this motor for a long time.
36. I think I should tell everybody about it.
37. You need not type this letter.