Change to the plural as in the example: It is a book. They are books. 1. He is a man. 4. It is a mouse. 2. She is a girl. 3. I am a teacher. 7. He is a boy. 5. You are a student. 8. It is a bird. 6. I am Spanish. 9. She is a woman. 10. You are a doctor 11. She is a nurse. 12. It's a piano.​