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