Sure! Here are the completed sentences using the correct forms of the words from the box:

1. The **orphaned** houses in the area are degraded and need urgent maintenance.
2. The local community centre has received a lot of money from an anonymous **donor**.
3. He has grown up in a(n) **orphanage** because his father could not take care of him after his wife's death.
4. The main **beneficiaries** of this community project are the local residents.
5. The **orphans** need assistance from the whole society, so everyone needs to join hands.
6. He didn't want the job very much, so he accepted the offer **voluntarily**.
7. To be completely fair, we need **interest** to do this job.

Let me know if you need any more help!