用五句英语表达一下内容:三年前:1.只有一栋三层的教学楼; 2.老师在黑板上写字;

Huge changes have taken place in this campus. Three years ago, there was only one three-floor building that teacher could merely write on the blackborad. Except for the annual sport meeting, there were no else activities. However, a new library is built and teachers could have classes with the help of computer. A lot of extracurricular activities are held up , such as Dancing Festival and so on.