I. Turn the following sentences into the passive voice:

1. He feeds the cat every day.     ............................................................................................                                   

2. People raise cows in Ba Vi.- Cows are fed in Ba Vi..............................................................

3. They don’t clean the classroom every day. ........................................................................

4. Do you clean your teeth every day? ...................................................................................

5. He ate chicken yesterday. ..................................................................................................

6. They first published this dictionary in 1870. .....................................................................

7. Someone broke this mirror last night. .................................................................................

8. He didn’t sweep the floor last Monday. .............................................................................

9. Where did he meet her yesterday? ............................................................................................

10. They are painting the kitchen now. ....................................................................................

11. They have decorated their house recently. .........................................................................

12. He hasn’t cleaned the floor yet. ..........................................................................................

13. Have you done the homework yet? ....................................................................................

14. They will speak English at the conference. ........................................................................

15. He ought to do housework every day. ................................................................................