高中英语作文500字：An Instructive Day
today is march 12, our national tree planting day. our class observed the day by planting trees.
in high spirits we talked and smiled all the way. as soon as we got to a piece of wasteland far from the school, we began to work. some were engaged in digging holes; some were busying themselves in covering the roots of the young trees with earth and watering the trees one by one. we worked so hard that soon each of us was wet in sweat.
on the way home we kept on singing up, because weve done a good thing to make our homeland green.