Respuesta:
1. on
2. between
3. under
4. in
5. on the right / in front (no estoy segura)
6. on
7. between
8. on the left of
9. on the right of
10. on
11. between
12. on the left of
13. in front of
14. on
15. on
16. on
17. in
18. on
19. on the right of
20. on the left of
