1.
1. old.
2. parents.
3. dark.
4. father.
5. tall.
6. brother.
7. short.
8. sister.
9. children.
10. uncle.
11. big.
12. aunt.
13. slim.
14. long.
15. twins.
16. young.
17. grandfather.
18. grey.
19. grandmother.
20. wavy.
2.
2. Peter's hair is straight. His eyes are brown.
3. Louise's hair is wavy. Her eyes are dark.
4. Mike's hair is dark. His eyes are brown.
5. Kate's hair is fair. Her eyes are blue.
3.
my, your, his, her, our, their, its.