1. This flower is watered by my father every morning.

2. Fiona was invited to John's birthday party last night.

3. The dinner is being prepared in the kitchen by her mother.

4. Our teeth should be cleaned twice a day.

5. The english grammar has been explained by our teachers.

6. The accident was caused by some drunk drivers in this city.

7. Tom's parents will be visited next month.

8. the secretary wasn't phoned by the manager this morning.

9. Was this beautiful dress made by Mary?

10. These old pictures won't be hung 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 greeens for christmas day.

13.The cats had been fed (by Ann) 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) ?

16.The new president will be interviewed on TV by some people.