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*đã kí

25. The Chinese invented paper, the main writing material today.
- Paper,  the main writing material today, was invented by The Chinese
26. Jim's daughter drew that picture.
- That picture was drawn by Jim's daughter
27. A new roof was put on last year.

-  They put on a new roof last year.
28. Someone empties the dustbins every Thursday.
- The dustbins are emptied every Thursday.
29. She delivers milk at about six o'clock .
- Milk  was delivered at about six o'clock.
30. They are going to finish a new school in the village next year.
- A new school is going to be finished in the village next year by them.