Here are the wishes you can complete for each statement:

19. I'm afraid he won't get over his illness soon.
**I wish he would get over his illness soon.**

20. I can't hear that strange noise.
**I wish I could hear that strange noise.**

21. They won't come here again.
**I wish they would come here again.**

22. I can't give up smoking.
**I wish I could give up smoking.**

23. I will be late for school.
**I wish I wouldn't be late for school.**

24. I'm sorry I can't help you.
**I wish I could help you.**