请帮忙看看下面两个英语文段有无语法或其他什么明显的错误?如有请指出并说明原因,

请帮忙看看下面两个英语文段有无语法或其他什么明显的错误?如有请指出并说明原因,
如果能给出优美地道的修改方案那就再好不过了.
On the morning of April 29,2007,from 10:00 to 11:00,hundreds of millions of
students from primary,middle schools and universities all over China joined
in a national student sports program.Eleven million students in Jiangsu took
an active part in this program.
April 29,2007 kicked off a new national initiative to promote sports in
China.For one hour,from 10:00 to 11:00,hundreds of millions of students of
all ages joined in a national student sports program.In Jiangsu
province,eleven million students eagerly participated.