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1. His bicycle is cleaned twice a day.
2. The clothes are washed (by her) every day.
3. The dogs are fed (by him) twice a day.
4. A lot of potatoes are grown in this field.
5. The dishes are washed by my mother every day.
6. The flowers are watered by Peter every day.
7. Our homework is done in the evening.
8. Chinese is spoken in this village.
9. The furniture is dusted by my sister once a week.
10. Their house is decorated for Christmas.
11. Rice is eaten by Vietnamese people every day.
12. The floor is swept (by her) every day.
13. Old car tires are recycled to make pipes.
14. Rice is grown in tropical countries.
15. This machine is used to produce coffee.
Bị động HTĐ : S is/am/are V3/ed (by O).