Răspuns:
1. was...discovered
2. were...held
3. was...born
4. was...invented
5. is considered
6. were...used
7. is...located
8. is...spoken
9. been written
10. is...celebrated
11. is...celebrated
12. is...celebrated
13. was...built
14. Do...include
15.was...settled
16. are...produced
17. be seen
18. are represented
19. are...made
20. is...called
