Is she a builder?
No, she isn't.
Is she a student?
Yes, she is.
Who is it?
She is a teacher.
Is he a builder?
Yes, he is.
Who is it?
He is a waiter.
Is she a vet?
Yes, she is.
Who is it?
She is a vet.
Who is it?
He is a builder.
Who is it?
He is a pupil.
Is he a vet?
No, he isn't.