Дайте краткий отрицательный ответ.
Example: 1. Is your brother a student? (an engineer)
- No, he isn’t. He is an engineer.

2. Is Mary an actress? (a secretary)
3. Are you an architect? (an artist)
4. Are Paul and John schoolboys? (students)
5. Is your father a singer? (a teacher)
6. Is your aunt a librarian? (a nurse)
7. Is your uncle a teacher? (an actor)
8. Are your sisters dancers? (singers)
9. Is your son a student? (a worker)
10. Are you school teachers? (mechanics)
11. Are you a doctor? (typist)
12. Is your mother a nurse? (a doctor)
13. Are you engineers? (officeworkers)