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It was Saturday， just before May Day。 My classmates and I went to the park nearby， we didn't go there for amusement but took part in voluntary labor。

We got there at 9：00。 We were divided into three groups and then began working。 The students in Group One planted trees and watered flowers。 The task for Group Two was collecting the litter left about by tourists and cleaning the benches。 The group I was in got to the Children's Playground and wiped all the equipment clean。 We worked very hard。 At 11：00， when all the work was finished up， all my classmates met again。 Although everyone was in a sweat， yet we felt happy because we had done good job。