Ответ:

1. You are not an engineer.

2. His little brother is not a schoolboy.

3. Her parents are not at home.

4. Out teacher is not at the library.

5. The cars are not the street.

6. The theater is not in the centre of the town.

7. My cousin is not at school.

8. They are not good sportsmen.

9. His father is not a worker.

10. The street is not narrow.