1. Paper ............ (invinted) in china
2. hundreds of books ........... (puplish) every year
3. Football .......... (play) all over the world
4. The olympic Gones ............ (hold) every four years
5 the first trainers .......... (design) in the USA '
6. the London Eye .................. (construcend) in 1999

passive voice in past