第20题: [单项选择]Passage One Questions 26 to 28 are based on the passage you have just heard. A. How to improve transportation. B. The best transportation facilities. C. A comparison between railway and airplane. D. Transportation in China. 参考答案:D 答案解析:[听力原文]26-28 I travel quite a lot in Beijing. I think the underground railway is marvelous. I