Ответ:

1. aren't you

2. didn't I

3. didn't I

4. doesn't it

5. don't I

6. doesn't she

7. didn't I

8. isn't it

9. will he

10. isn't it

11. aren't I

12. isn't she

13. were you

14. did I

15. did he

16. do I

17. aren't they

18. can he