1. This flower is watered by my father everyday.
2. Fiona was invited by John to his birthday last night.
3. The dinner is being prepared by her mother in the kitchen.
4. Our teeth should be cleaned twice a day
5. The English grammar has been explained by our teachers.
6. The accident in this city was caused by some drunk drivers.
7. Tom's parents will be visited by their son next month.
8. The secretary was not phoned by the manager yesterday morning.
10. These old pictures won't be hanged by me in the living room.
11. This factory wasn't built by the German during the Second World War.
12. This house and these cars are going to be painted by the Greens for Christmas Day.
13. An's cat had been fed by her before she went to the cinema.
14. The pollution problems have been discussed by the students since last week.
15. Has the most valuable painting in the national museum been stolen by the thieves?
