11. How often (do) you (review) your lessons?

12. Can you speak slowly, please?

13. I (do not) understand.

14. She (works) as a secretary in a big company.

15. Miss Clara (does not) belong to me.

16. It (is) usually so humid here in summer time.

17. Don't forget to take your coat, it (is) cold outside.

18. This flower (smells) so good.

19. That coat over there (does not) belong to me.

20. Where (do) you (live)?