Вставте глагол to be в требуемой форме Present Simple

1.am

3. Is your aunt a nurse? - Yes, she is.4. Are they at home? - No, they are not. They are at school.5. Are you an engineer? - Yes, I am.6. Is your friend a photographer? - No, she is not a photographer, she is a student.7. Are your brothers at school? - Yes, they are.8. Is this her watch? - Yes, it is.9. Max is an office-worker.10. We are late, sorry!