V. Complete these sentences with appropriate prepositions.
1. Last summer, we provided evening classes _________ twenty homeless children.
2. Nearly every American has done volunteer work _________ his or her life.
3. People who live _________ street are called street people.
4. What do you know _________ community service?
5. We often visit and help old people in Sunflower nursing home _________ weekends.
6. They give care and comfort _________ disadvantaged children.
7. We have collected used books for poor students _________ three years.
8. Clean air provides us _________ a healthy supply of oxygen.
9. We hope that students will enjoy taking part _________ the projects.
10. They always go to school _________ foot.
11. I was absent _________ class yesterday.
12. He was delighted _________ the present you gave him.
13. It is very kind _________ you to help them.
14. Is it difficult _________ handicapped children to study with other children?
15. I’m very grateful _________ her for her help.
