假设你是李华,你学校组织了一次主题为"家乡在发展"的英语演讲比赛.请根据以下表格信息,以"Great Changes in My Hometown"为题,写一篇不少于80词的演讲稿.全文可适当发挥.
要求:（1）下列表格中提供的信息不少于三项.
（2）文中不能出现真实的姓名和校名.

Twenty years ago	Now
small houses	tall buildings
poor medical care	good medical care
letter,fax machine	cellphone,Internet
few leisure activities	various kinds of leisure activities