Please help; if you don’t know the answer to these problems then go away. I don’t need you to comment about it, also no links.

Answer:
1. they
2. his
3. their
4. her
5. she
6. his or her
7. they
8. their
9. his or her
10. he
11. her
12. his or her
13. their
14. his or her
15. her
16. their
17. his or her
18. their
19. her
20. their