请帮看看有没有语法错误

Good afternoon!My lovely friends!
Today I will talk to one word: dream. Do you have a wonderful dream?
I think everyone must have a dream. Because it is the world's most beautiful things.
Do you know Obama ? He is a black .He has an "American Dream"：Nothing is impossible! So Obama is the first black U.S.A president.
Do you know Li An?He is a director. He said:Success belongs to those who have a dream . So his efforts in order to dream. He proudly held up the Oscar. His heart will always have a dream on film.
Do you remember the Olympic dream in 2008 it? When the 29th Olympic flame lit, the Chinese people's dream realized! When the "One World, One Dream" sounded the voice of the world's dream was ignited!
Yes!
Dream is the beginning of the power savings ,dream is what we achieve the necessary conditions for the success of the other side .
Not dream of life will be empty, no dreams of life as the

Good afternoon! My lovely friends!
　　Today I will talk to one word: dream.
　　改为：What I am going to talk about will be around one word: dream.
　　Do you have a wonderful dream?
　　I think everyone must have a dream.
　　Because it is the world's most beautiful things.（改为：it is the most beautiful thing of the world.名词所有格只用于表示生命的名词；另外it is ... thing而不是things）
　　Do you know Obama ? He is a black .He has an "American Dream"：Nothing is impossible! So Obama is the first black U.S.A president.
　　Do you know Li An?He is a director. He said:Success belongs to those who have a dream .
　　So his efforts in order to dream.
　　此句有语病，是否要表达：He made his effort in order to realize his dream.他尽力去实现自己的梦想。
　　He proudly held （helped） up （是否要表示支持？那就改成supported,注意过去时态！）the Oscar.
　　His heart will always have a dream on film.
　　改为：He always had a dream on film in his heart.
　　Do you remember the Olympic dream in 2008 it(it多余，去掉。)?