阅读理解。 下面是一篇杂志文章，请将标有A--F的句子插入文章中标号为1--5的合适位置，使这篇文章意义完整，结构连贯，其中有一个句子是多余的。 As we know, the concept of the Beijing 2008 Olympic Games is 'Green Olympics, High-tech Olympics and People's Olympics.' 1 . Among them 'Green Olympics' embraces the essence of the 3000-year long Chinese philosophy, namely harmony and unity of nature and human existence. On the World Environment Day in 2003, Beijing Organizing Committee for the 2008 Olympic Game began the Green Office Project. 2 . On September 24, 2005, the logo of the Green Olympics was shown at the Beijing Young Palace. 3 . It consists of the crown of a tree and the shape of a human being that are used to create the form of a large tree reaching the sky. The image represents harmony and unity between human beings and nature. Just like swinging colored strips that surround and cross each other, the green lines form a crown of tree and recall flowers in full bloom, expressing the sustainable (可持续的) development of environment protection. 4 . Let's participate in green actions, such as beautifying the environment, protecting the environment and saving resources. 5 . A. No matter when it is, we need green space. B. This concept includes three themes. C. Let's carry the theme of Green Olympics through to the end. D. The logo uses a form of the traditional handwriting. E. The Beijing Olympic Games is a testimony of the fact that the world has its trust rested upon China. F. It covers such areas as saving energy and water, trash classification, and use of office equipment, paper recycling, paperless office work and the environmentally friendly behaviors of staff.