Here are the matches for the words or phrases:

1. orphanage - E. a building where orphans live and are looked after
2. charity - I. an organization set up to provide help and raise money for those in need
3. volunteer (n) - G. someone who is not paid for the work that they do
4. homeless - B. without a place to live
5. needy - H. very poor
6. donate - J. to give something such as money or goods to an organization, especially to a school, hospital, political party, or charity
7. exchange - A. to give something and receive something of the same kind in return
8. tutor (v) - D. to give private lessons in a particular subject
9. service - C. a system provided by a government or official organization for the needs of the public
10. elderly - F. to be old or aging

Your answers would be:
1 - 5
2 - 1
3 - 7
4 - 2
5 - 8
6 - 10
7 - 4
8 - 6
9 - 3
10 - 9