正确答案This summer, I took part in the voluntary work of the 2010 Shanghai Expo. Before it began, we several weeks of training classes for the Shanghai Expo services, improving our English both in speaking and listening. We had to get familiar with all the roads, streets and traffic of Shanghai. I addition. We were trained to know the cultures of different nations. During the Expo, our work began around 8:00 am and ended about 7:00 pm. We led people to their seats and answered their questions. Using English, we introduced Shanghai to foreign friends and gave them accurate information. Sometimes we introduced to the audience the diverse culture and economic situation in China. From my experiences. I become more roud of our motherland, for her great progress. I take great pride in being a volunteer. 略