1. I'm not a pupil. I am a student2. His brother is a pupil. He is at school3. My parents are engineers. They are at work4. Are you a doctor? " No, I'm a teacher. "5. Your sister is a student? -No, she's an engineer. She's at work6. Her sister is not a secretary. She is a teacher7. Are they doctors? " No, they are pilots. "8. Is your sister at home? - No, she's at work.9. Our father is a scientist10. His aunt is not a doctor. She is an actress11. This is my book. She is on the table12. My cousin is not a scientist, he is an engineer13. This is a picture. They are on the wall. Pictures are very beautiful14. My grandmother is a pensioner. She's not at work. She is at home15. Are your children schoolchildren? - Yes, they are schoolchildren