Odpowiedź :
Odpowiedź:
1. Dad's birthday - possesive s
2. My friend's fifteenth birthday. - possesive s
3. Anna's fifteen today! - is
4. When's your birthday? - is
5. The students' backpacks - possesive s
6. They're Mum and Dad's keys. - possesive s
7. That's my book. - is
8. It's her new car. - is