английский, прошу, помогите.

Put the correct form of the verb to be in Present Simple.
1. I ...a pupil. 2. My father ...not a teacher, he ...a scientist. 3. ..your aunt a doctor? – Yes, she ...4. ..they at home? – No, they ...not at home, they ...at work. 5. My brother ...a worker. He ...at work. 6. ..you an engineer? – Yes, I....7. ..your sister a typist? No, she ...not a typist, she ...a student. 8. ..your brother at school? – Yes, he ...9. ..your sister at school? – No, she ...not at school. 10. My sister ...at home. 11. ..this your watch? – Yes, it ...12. She ...an actress. 13. This ...my bag. 14. My uncle ...an office-worker. 15. He ...at work. 16. Helen ...a painter. She has some fine pictures. They ...on the walls. She has much paper. It ...on the shelf.