Who's he
He's a cook.
Who's he?
He's a farmer.
Who's he?
He's a doctor.
Is she a police officer? (yes)
Yes, she is.
Is he a doctor? (yes)
Yes, he is.
Who's she?
She's a teacher.
Who's she?
She's a police officer.
Who's she?
She's a student.
Who's he?
He's a taxi driver.
Is he a farmer? (no)
No, he isn't.
Who's she?
She's a nurse.
Is she a nurse? (no)
No, she isn't.