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

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 **musician** 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 eating **fried** chicken and French fries. (fry).
27. The pineapple was sweet and **juicy**. (juice).
28. Meats and fish are **commonly** used in all Vietnamese cooking. (common).
29. The chicken meat is **boned** and cut into thin slices. (bone).
30. The sauce itself was **fragrant** and slightly sweet. (fragrance).