11.
1. who's that girl with the blond hair?
2. whose hiking boots are these?
3.who's your class teacher?
4. who's mark's new girlfriend?
5. whose book is this?
6. whose birthday is it today?
10.
1.anna's
2.John's, sister's
3. teacher's
4. parent's
5.james's
6.kate's, children's