Grammar ex. 27

  1. --
  2. in
  3. over
  4. for
  5. on/--
  6. Over/During/In
  7. at
  8. until/before
  9. in
  10. since
  11. By/At
  12. for
  13. since
  14. during
  15. by/at
  16. at/by
  17. during/in
  18. in
  19. by/at
  20. at
  21. during
  22. on
  23. --