Odpowiedź :
1. on, at, in
2. in
3. on
4. in
5. in
6. in
7. in
8. in
9. in
10. at, on
11. in, at
12. in
13. at
14. at, in
15. in, in
16. on
17. on
18. on
19. in
20. at, on
1. on, at, in
2. in
3. on
4. in
5. in
6. in
7. in
8. in
9. in
10. at, on
11. in, at
12. in
13. at
14. at, in
15. in, in
16. on
17. on
18. on
19. in
20. at, on