1. discovered by Isaac Newton
2. This website is visited by millions of people everyday
3. My new speakers were not delivered yesterday
4. These devices are not used by us very often
5. Was the telephone invented by Alexander Graham Bell?
6. Thousands of packages are delivered by this company everyday
7. The house was not built by them in 1920s
8. This room is not cleaned by us very often
9. Coffee is drunk by people all over the world
10. Was your phone stolen by Kathy?
11. Are the parcels sent by them every day?
12. Football is played by children all over the world
13. Are the cars fixed by your brother?
14. Are the meals prepared by Jane and Joe?
15. Are a lot of many earned by artists?