二年级作文状物：About Trees（关于树） Ladies and gentlemen I want to say something about trees As we know now trees are very important to human beings First of all they benefit our health They send out oxygen for us to breathe We can\’t live without treesSecondly trees can beautify our environment As trees are so important we must do our best to protect them We must enforce the tree protection laws We must plant as many trees as possibleOnly in this way can we live happily in the beautiful world。 本文来源：https://www.wddqw.com/doc/0138e7a4905f804d2b160b4e767f5acfa0c783d6.html