Ex.7
2. Has Susan got a pet? Susan hasn't got a pet.
3. Can Bill dive? Bill can't dive.
4. Is it an old house? It isn't an old house.
5. Have they got stamps? They haven't got stamps.
Ex.8
2. She
3. She
4. her
5. Their
6. His
7. her
8. They
9. her
10. her
Ex.9
1. dog's
2. Dad' s
3. man's
4. girls'
5. Linda's