词汇运用：
【小题1】I ____________________(保持联系) my friends from college in the past five years.
【小题2】Our country has _______ great _______(取得了巨大进步) since the reform and opening-up.
【小题3】Thanks to the government’s efforts, the poor children can ________________________(受到了良好的教育).
【小题4】Beijing has already ______________________________(成功地举办)the 2008 Olympics.
【小题5】I have _______the changes of my hometown ______________(亲眼目睹).