Dear Lily, Here I would like to tell you something about our school. ____(三年前), our school was very small, with only one building and a sports ground. However, great changes have ____ (发生)in our school in the past three years. Now, we have new ____ (教学楼) beside the old one. Besides, a new ____ (图书馆)has been set up, where many students ____ (努力学习) at their lessons when they are free. ____ (除了)that, the whole school campus is ____ (包围)with trees and flowers, sending off ____ (新鲜空气)all day long. Now the new playground has been removed ____ (在......外面)the school campus. Of course, we couldn't have made such great progress without the ____(支持)of the government and many citizens. Yours, Betty