1 Volunteers are needed to help us save endangered species.
2 ... have been improved by the volunteer doctors.
3 ... were stopped because...(переписывай что после)
4... is going to be run.
5 ...was developed by local volunteers.
6 ... has been raised by volunteersat the Animal Welfare Organisation.
7 ...will be used to star new volunteer projects.
8 ... asked to be a vo;unteer by the Cat Protection Society.