1.to the bank of Yangteze River在长江边上2.In 2005,it held national games quite successfully.既然是2005年的事,用过去时3.te health id the most important for our bodies.貌似有语病,能再举个例子说说还有什么对body很重要的,money?fame?那不是对body重要的吧.4.except+sth/doing
润色一下：I'm the host of Youth Olympic Games.
As all of you may know,Nanjing will host the Youth Olympic Games in 2014.Nanjing ,as the the capital of Jiangsu,is located in the east of China,to the bank of Yangteze River.With the name of the once capital of six dynasties,it has such a long history with so many attractive stories.Recently in 2005,it held the national games quite successfully.
It'll certainly have great meanings to our teenagers.Especially,it can remind us to do more exercise.As for my part,I mysely will do more exercise and remind my classmates to do more also because I know health is so precious.
Besides,the game will call us not to forget our duty——protect the environment.It's high time we paid more attention to the environment.
I think 2014 Nanjing Youth Olympic Games will no doubt be a big success.Don't hesitate to join our efforts!