Is he a fireman?
Yes, he is.
Is she a waiter?
No, she isn't. She is a vet.
Is she a vet?
No, she isn't. She is a teacher.
Is he a pilot?
No, he isn't. He is a doctor.
Is she a nurse?
No, she isn't. She is a housewife.
Is he a builder?
Yes, he is.