Complete the sentences using the correct form of the verb 'to be'.

1. He is a boy. 2. You are in my house. 3. They are from Germany. 4. It is my dog, Rex. 5. We are happy. 6. He is very tall. 7. Anna is in the garden. 8. We are good friends. 9. My cat is black and white. 10. The sun is yellow. 11. I am hungry. 12. You are doctors. 13. She is beautiful. 14. Tom is strong. 15. My mother is sad. 16. I am angry. 17. My car is new. 18. We are at school. 19. It is cold. 20. They are tigers.