on april 28th, my classmates and i went to the park near my school where we took part in a volunteer labor.

　　we got there at nine o'clock. after ided into three groups, we began to work.each group had their own tasks. group one planted trees and watered flowers. group two picked up litter left by tourists and cleaned the benches. my group wiped all the equipment in children's playground. each of us worked hard.

　　at about half past eleven, we finished working. though we were tired,we were happy. it was a meaningful day for us because we had done a good deed.