1. I'm twelve years old.
2. My brother is a student.
3. Are you from Russia?
4. There is nothing on the table.
5. Is there a problem?
6. Our party isn't tonight.
7. The library is in that building.
8. It's Sunday.
9. It isn't autumn now.
10. Are you at school now?
11. We are at home.
12. My friend is ill.
13. They are so happy to be there.
14. Is the food on the table?
15. She is our teacher.
16. They aren't twins.
17. He is a famous singer.
18. I'm smart, aren't I?
19. They are my friends.
20 It is hot.
