Drugs are tested in patient volunteers to monitor adverse reactions to long-term use.

Volunteering makes a significant contribution to the economy all around the world.

It is meaningful to save some pocket money for charity work.

Angelina Jolie began taking an interest in charity work. She was filming in Cambodia then.

The boy was only 10 years old. He established an athletic programme for children with special needs.

Volunteerism is on the rise in the United States, especially among retired persons.

Mary is disappointed with the volunteer work in this charity organisation.

Some students took part in directing the traffic. Others took care of the war invalids.

They were busy with their schoolwork. They spent time helping the elderly in the retirement home.

Volunteering has a considerable impact on the education system itself.

SHARE is a non-profit organisation. It provides thousands of girls in Africa with books and school supplies.

It is recognized that students' volunteer work will benefit communities. However, its primary purpose is to contribute to students' development.

Volunteer work includes a wide range of activities. Among them are coaching children and youth.

Nine volunteers were recruited to take part in the study.

Some volunteers are not willing to travel. They prefer instead to seek opportunities nearer home.

The lack of systematic data on volunteer work is not simply an academic matter. It also limits the ability to make the most effective use of this important resource.