Ответ:

17. collecting

18. unfortunately

19. unfamiliar

20. unadvantage

21. unsafe

24. heard

25. was jogging, saw

26. was cooking, realized

27. are, doing

28. will leave

на некоторые я не ответила

Ответ:

17 collecting

18 unfortunately

19 unfamiliar

20 disadvantage

21 unsafe

22 unreliable

23 enjoyment

24 heard

25 was jogging, saw

26 was cooking, realized

27 are you doing

28 leaves

29 have been looking

30 had have