Answer:
16. donot use it carefully
17. hadn't / wouldn't
18. would
19. will
20. will enjoy
21. ?
22. will
23. ?
24. would Just a simple guess
25. wanted
26. would
27. will go / goes
28. ?
29. would be
30. wouldhave/ would
Just a simple guess if it helps you I will be proud if it is mistake I am so sorry has been long time without grammer sub