Is he a cook?
Yes, he is.
Is he a nurse?
Yes, he is.
Is he a cook?
No, he isn't. He's a pilot.
Is he a doctor?
Yes, he is.
Is he a teacher?
Yes, he is.
Is he a pilot?
Yes, he is.
Is she a teacher?
No, she isn't. She's a student.
Is she a teacher?
No, she isn't. She's a cook.
Is he a student?
No, he isn't. He's a teacher.
Is he a student?
Yes, he is.
Is she a doctor?
No, she isn't. She's a nurse.