1. I am a pupil. I study at school.
2. My brother is a painter. He is not an engineer.
3. My sister is at work. She is a doctor.
4. He is a student.
5. Are you a student? No, I am a doctor.
6. My sister is at home.
7. We are not at the school. We are at home.
8. My brother is a pupil. He is at school.
9. Is your mother at home? - No, she is at work.
10. Is your cousin at home? - No, he is at school. He is a pupil.
11. Is your sister a teacher? - No, she is a student.
12. Is your father at work? - No, he is at home.
13. Is your sister a typewriter? - Yes, she is. - Is she at home? - No, she is at work.
14. My grandfather is a scientist.
15. My mother is not a teacher. She is a doctor.