Are they vets?
Yes, they are.
Are they bears?
Yes, they are.
Who is she?
She is a pupil.
Are they pupils?
No, they aren't.
Are they tigers?
No, they aren't.
Are they teachers?
Yes, they are.
Are they waiters?
Yes, they are.
Are they teachers?
No, they aren't.
Who is he?
He is a waiter.
Are they oranges?
No, they aren't.