题目内容：
Questions 16 to 19 are based on the passage you have just heard.
A．To win over the majority of passengers from airlines in twenty years. B．To reform railroad management in western European countries.
C．To electrify the railway lines between major European cities.
D．To set up an express train network throughout Europe.
参考答案：【答案仅供学习，请勿对照自行用药等】
答案解析：