假如你是李华，你的美国朋友David来信问有关北京为迎接2008年奥运会而进行的城市美化工作的情况。请你根据下表的内容用英语写一封短信，并欢迎他届时来北京。
口号 “绿色奥运”
计划投资 122亿美元
美化内容 环境 大面积植树、种草、栽花
环保 使用清洁能源：处理和再利用污水
目标 花园城市：天再蓝些，水再清些
.生词提示：slogan 口号
Beijing Olympic Games
Dear David,
 How nice it is to hear from you again. Now let me tell you something about the beautifying work in Beijing for the 2008 Olympic Games. Our slogan is “Green Olympics”. 12.2 billion dollars will be spent on this project. A lot more trees, flowers and grass will be planted in many places to make Beijing more beautiful. We will use clean energy and try our best to make waste water clean and reuse it. In 2008, you will see Beijing as beautiful as a garden, with cleaner water and a clearer sky.
I look forward to meeting you in Beijing in 2008.
Yours,
Li Hua