【单选题】There are more older people who want to do VSO because______. Ⅰ. more people take early retirement Ⅱ. more older people feel they are in good health Ⅲ. the foreign countries where the volunteers go wa...
【简答题】翻译: In recent years, more and more cities in China have begun to build subways. The development of subways can help reduce traffic congestion and air pollution in cities. The subway has the advantages...