Verified answer

1. This is a pen. That is a pencil. 

2. This is a book. It is my book. 

3. Is this your pencil? — No, it isn't my pencil, it is my sister's pencil. 

4. I have a sister. My sister is an engineer. My sister's husband is a doctor. They have got two children. 

5. This is a girl. This girl is their daughter. Their daughter's name is Vera. 

6. That is a boy. That boy is her brother. Her brother's name is Nick. 

7. This is our flat. 

8. We have got a car. Our car is not expensive but reliable. 

9. I have no pet. 

10. My granny has got a headache. She has no idea what to do. 

11. I have a friend. His name is Mike. My friend is very good. 

12. It's a cat. Its tail is long and bushy. It's Mike's cat.