27. am, is или are?

1. This is my family. 2. Ann and Sam are my friends. 3. Look at my pet. It is nice. 4. What is your lucky number? 5. He is my big brother. 6. They are my pets. 7. Helen is late. 8. Hello! I am Vadim. 9. Ann is my friend. 10. We are brothers. 11. What is his name? 12. I am your friend. 13. She is at school. 14. I am nine.