Sure! Here are the sentences completed with the correct prepositions:

**Exercise 4: Complete the sentences with the correct preposition.**
1. Students in our school raised money, old books, and clothes **for** charity.
2. He likes to give a small amount of what he earns **to** charity.
3. The programme helps students get some experience **in** the world of work.
4. The road they built is a direct benefit **to** the villagers.
5. Many workers have little attachment **to** the company.
6. The children are aware **of** the danger of cyberbullying.
7. Many young people are ignorant **of** recent history.
8. The internet is a tool that is useful **to** all of us.
9. They want to walk 30 miles **for** charity.
10. He advised me to get experience **in** a related field like travel.

**Exercise 5: Supply the correct form of the word in the brackets.**
1. Julia was an **orphan** and lived with her aunt when she was a child. (orphanage)
2. He underwent a lot of hardships in his **childhood**. (child)
3. The flat has four separate bedrooms and a **kitchen**. (kitchen)
4. It’s scary to see the **flood** river carry trees along. (flood)
5. This is the biggest **donation** we’ve had up to now. (donate)
6. Governments are constantly striving to create **equality**. (equal)
7. They are a poor and **developing** nation. (develop)
8. She is currently a **volunteer** worker at the hospital. (volunteer)

Hope this helps!