cook
student
Are you a student?(自答)
Yes, I am.
Is he a teacher?
No, he's not. He's a doctor.
doctor
teacher
driver
Are you a nurse?(自答)
No, I'm not. I am a student.
nurse
Is your brother a doctor?
No, he's not. He's a teacher.
Is she a cook?
No, she's not. She's a nurse.
Is your father a driver?
Yes, he is.