Is he a cook?
Yes, he is.
Is she a builder?
No, she isn't. She's a doctor.
Is she a doctor?
No, she isn't. She's a police officer.
Is he a zoo keeper?
No, he's a teacher.
Is she a teacher?
No, she isn't. She's a farmer.
Is he a football player?
Yes, he is.
Is he a waiter?
Yes, he is.
Is she a scientist?
Yes, she is.