Chuyển các câu sau sang câu bị động
1.Mr.Huynh teaches them vocabularies.
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2. You should do your homework.
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3. Nam built this house in 1999.
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4. Wind posted the letter last month.
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5. She will open her new restaurant next Monday.
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6. We had to postpone the meeting because the boss was ill.
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7. Hoa cleans the window every week.
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8. This bill includes service.
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9. Nobody told him that his parents came back.
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10. They used this fans all day.
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