Answer:
1. could
2. should
3. can
4. could
5. might
6. can
7. must
8. manage
9. might
10. could
11. should
12. should
13. might
14. must / ought to
These are only suggested others are suitable for some too, I just think these make more sense.
Hope this helps :)
I need you to take a picture of the paragraph the question is referring to
I think you should write an essay stating your opinion on learning.