Sure, here are the correct forms of the words to complete the sentences:

1. Minh is very **creative** and he paints very well. (CREATE)
2. Nam's hobby is collecting coins. He is a coin **collector**. (COLLECT)
3. My uncle often takes a lot of **beautiful** photos. (BEAUTY)
4. I like reading books because it **widens** my knowledge. (WIDE)
5. I think collecting old bowls is a very **interesting** hobby. (INTEREST)
6. Are you interested in **cooking**? (COOK)
7. I think staying at home all day is **boring** because I don't know what to do. (BORE)
8. It is **unhealthy** to eat a lot of sweetened food and drinks. (HEALTH)
9. I love **making** pottery because it is challenging. (MAKE)
10. Many people do volunteer work because it can make a **difference** in their community. (DIFFER)
11. Some students usually teach street **children** English in the summer. (CHILD)
12. My dad enjoys **collecting** stamps, and he has a big stamp collection. (COLLECT)
13. Having a pet helps children take on more **responsibility**. (RESPONSIBLE)
14. **Colorful** vegetables are very good for your health. (COLOUR)
15. Did you read books to the **elderly** in the nursing home last Sunday? (ELDER)
16. At this school fair, you can exchange **used** paper for notebooks. (USE)