Subways are underground trains, which usually operate 24 hours a day. They are found in larger cities and usually run between suburbs and downtown areas. Maps and schedules are available from the ticket office. If you take the subway often, you can save money by purchasing a monthly pass(月票). City-operated buses run on various routes(线路)and are designed to be at certain places at certain times. Maps and schedules may be posted at certain stops, or they may be available at local banks, libraries, student unions, or from bus drivers. Buses run mainly during the day. Fare is paid by exact change in coins, or by monthly passes. Taxis are generally more expensive in the United States than in other countries. If you use a taxi, be sure you ask the amount of the fare before you agree to ride. The driver usually expects a tip(小费)of 15 percent of the fare.
单选题 According to the passage, subways are underground trains, which usually run______.
【正确答案】 D
【答案解析】解析：事实细节题。由题干中的underground trains定位到第一段。该段第二句指出，地铁可以在较大的城市中见到，一般在城郊和市中心之间运行。D)between thesuburbs and the city centers是对原文中between the suburbs and the downtownareas的同义转述，由此确定答案为D)。
单选题 You can get the maps and schedules of the subways______.
【正确答案】 D
【答案解析】解析：事实细节题。由题干中的maps and schedules和subways定位到第一段第三句。该句提到，路线图和时刻表可以从售票处获得。由此可以确定D)为本题的正确答案。
单选题 From the passage we learn that______.
【正确答案】 C
【答案解析】解析：事实细节题。本题四个选项都是关于bus的，所以可以定位到第二段。本段最后一句提到，公交车车费可以用准确数目的硬币零钱或者月票来支付。C)给出了支付公交车车费的一种形式，并且和文章中的原句基本一致，由此确定C)为本题的正确答案。
单选题 When you take a taxi, you'd better______.
【正确答案】 B
【答案解析】解析：事实细节题。由题干中的takea taxi定位到第三段。第三段第二句指出，如果你打算乘坐出租车，一定要确保在乘车之前问清车费的金额。题干中的you’dbetter是对原文中be sure的同义转述，其后的内容与B)的内容基本一致，所以确定B)为正确答案。
单选题 The passage mainly tells us about______.
【正确答案】 C
【答案解析】解析：主旨大意题。这篇文章介绍了美国人生活中广泛使用的三种公共交通工具：地铁、公交车和出租车。所以最合适、最具有综合性的答案为C)“美国的公共交通”。