Ответ:
1. necessary.
2. necessary.
3. necessary.
4. wherever.
5. wherever.
6. wherever.
7. necessary.
8. wherever.
9. necessary.
10. necessary.
11. necessary.
12. necessary.
13. wherever.
14. necessary.
15. necessary.
16. necessary.
17. necessary.
18. wherever.
19. wherever.
20. necessary, necessarily, necessary.
Объяснение: