一篇演讲,帮我找语法和词汇错误

题目

一篇演讲,帮我找语法和词汇错误
我等着呢,明天就用的：
I WANT TO BE A VOLUNTEER FOR SHANGHAI EXPO
As we all know,Shanghai will host the 2010 Shanghai World Expo ,as a Chinese,I feel very excited .I am proud of my country.
So,I think as a Chinese resident,I should do something useful for the world expo.I think if we become a volunteer,first of all,having high quality is very important because we,as volunteers on behalf of the entire image of China,must have high-quality,so I studied hard.There must be many people from many different countries and different nations.So there will be a wide range of different cultures.This really make Shanghai "an international metropolis," the title of the title.
Secondly,I think English is very important for the World Expo.English is the international language,most countries use English.So if we speak English well,we can help foreigners better.And people from other countries will think Chinese are friendly.Therefore,the most important thing is to try your best

答案

1.I think if we become a volunteer.中 we a矛盾,应该 I think if we become volunteers.
2.I think English is very important for the World Expo.中for 应改为to 是 英语对世博会很重要.
3.I hope the expo will be held successfully.
中 be held应为be hold ,被动中hold应用过去分词hold 而不是过去式held.
以上纯为个人见解.