Change into the passive voice
1. Mr Hung teaches them Math at school.
2. You should do your homework at night.
3. Mr Nam built this house in 1999.
4. Their daughter can write a letter in English.
5. She will open her new restaurant next Monday.
6. We had to postpone the meeting because the boss was ill.
7. Hoa cleans the window carefully every week.
8.This bill includes a lot of services in the hotel.
9. Nobody told him that his parents came back.
10. They used this electric fan all day.