Here are the correct forms of the words for each sentence:

14. Mike’s hobby is listening to music. He gets a lot **of enjoyment** from listening to music. (enjoy)

15. John is a stamp **collector**. He has a lot of rare and valuable stamps. (collect)

16. One third of children in the U.S. is **heavy** or obese. (weigh)

17. I have a **toothache** so I must go to a dentist. (tooth)

18. Junk food is **unhealthy**, so we shouldn’t eat too much junk food. (health)

19. Blood **donors** give blood for use in hospitals. (donate)

20. They opened a shelter to provide housing for the **homeless**. (home)

21. His friends are all **artists** - they’re painters, musicians, and writers. (art)

22. He later became a famous jazz **saxophonist** playing saxophone. (music)

23. The problems seemed so small and **unimportant**. (important)

24. The soup had a very **salty** taste. (salt)

25. She covered the cake with a **mixture** of sugar and whites of eggs. (mix)

26. Most children enjoy **fried** chicken and French fries. (fry)

Feel free to ask if you need more help!