1. the bicycle had been mended by her
2. the rice had been exported before may
3. she had been waited by me before I came here
4. I hadn't been met before I left
5. The cakes hadn't been eaten by him
6. the car had been cleaned by them by 3 p.m
7. the house had been bought by my friend before 1990 
8. had some question been asked by him?
9. the tenses had been studied by me before may
10. a lot of time had been wasted my the school boys