¡¡¡¡Today is Tree-planting Day.We went to plant trees in Daning GREenland.As soon as we arrived,we began to work.Some were digging holes,some were planting and others were watering.We all know trees are very useful to man.Growing trees means saving man himself.We all worked very hard.When the sun went down,we came back home.Although we were very tired,we felt very happy.