1. We visited our uncle's house yesterday. 2. I don't know my teacher's phone number. 3. They live in their grandparents' house. 4. I have forgotten my friend's address. 5. His sister's flat is big. 6. They answered their teacher's questions.7. My mother's car is new.
1. It is his book. 2. I love their songs. 3. This book is not yours, it's his book.
4. My favourite actor is Steven Seagal. 5. I don't like your work. 6.  Her sister is 5 years old. 7. Our house is situated on the bank of the river.