IV. Complete each sentence below by filling in each blank with the correct form of the word provided. 18. My dad enjoys_______stamps, and he has a big stamp collection. (COLLECT) 19. Having a pet helps children take on more_______. (RESPONSIBLE) 20. _______vegetables are very good for your health. (COLOUR) 21. Did you read books to the _______in the nursing home last Sunday? (ELDER) 22. At this school fair, you can exchange_______paper for notebooks. (USE)