volunteers
- volunteers are working for 2014 International Horticulture Exposition in Qingdao.
- __________ volunteers will be needed for 2014 International Horticulture Exposition (国际园艺博览会) in Qingdao.— Let’s go and join them.
- The volunteers sent _______ books to a mountain village school on Children’s Day.
- volunteers are working for 2014 International Horticulture Exposition in Qingdao.
- The volunteers a lot of help to the community for nearly ten years.
- The volunteers __ a lot of help to the community for nearly ten years.