When Melissa Mahan and her husband visited the Netherlands, they felt imprisoned by their tour bus. It forced them to see the city according to a particular route and specific schedule--but going off on their own meant missing out on the information provided by the guide. On their return home to San Diego, California, they started a new company called Tour Coupes. Now, when tourists in San Diego rent one of their small, brightly coloured three-wheeled vehicles, they are treated to a narration over the stereo system about the places they pass, triggered by Global Positioning System (GPS) satellite technology.
This is just one example of how GPS is being used to provide new services to tourists. "What we really have here is a technology that allows people to forget about the technology," says Jim Carrier of IntelliTours, a GPS tourism firm which began offering a similar service over a year ago in Montgomery, Alabama. The city is packed with sites associated with two important chapters in American history, the civil war of the 1860s and the civil-rights movement a century later. Montgomery has a 120-year-old trolley system, called the Lightning Route, which circulates around the downtown area and is mainly used by tourists. On the Lightning Route trolleys, GPS-triggered audio clips point out historical hotspots.
Other firms, such as CityShow in New York and GPS Tours Canada in Banff, Canada, offer hand-held GPS receivers that play audio clips for listening to while walking or driving. In South Africa, Europcar, a car-rental firm, offers a device called the Xplorer. As well as providing commentary on 2 000 points of interest, it can also warn drivers if they exceed the local speed limit.
If such services prove popular, the use of dedicated audio-guide devices could give way to a different approach. A growing number of mobile phones have built-in GPS or can determine their locations using other technologies. Information for tourists delivered via phones could be updated in real time and could contain advertisements. "Location-based services", such as the ability to call up a list of nearby banks or pizzerias, have been talked about for years but have never taken off. But aiming such services at tourists makes sense--since people are more likely to want information when in an unfamiliar place. It could give mobile roaming a whole new meaning.
When a traveler is in an unfamiliar place, （）
A. mobile roaming will meet his needs
B. he wants to know something about it
C. Location-based services play a key role in his traveling
D. he must understand the roles of Location-based services
参考答案：B
解析：
[直击题眼] 文章倒数第二句：But aiming such services at tourists makes sense-since people are more likely to want information when in an unfamiliar place．
[深层剖析] 由此句可知当一个人在陌生的地方时，他更想得到关于此地的信息。因此[B]正确。
[主干扰项分析] 其实由于旅行者身处陌生之地，所以才更有可能需要“定位服务”信息，而需要这些信息的目的是了解这个地方，[C]是达到[B]的手段，因此[C]不如[B]准确。任何事情的产生都会满足另外一个事物的需求，因此应慎选“…满足…”的选项，例如2006年22题的[C]选项，故[A]也错误。
[次干扰项分析] 选择[D]选项的同学应该是没有弄懂make sense这个词组的含义，make sense“有意义”；而 make sense of．．．才是指“搞清…的意思”，与understand同义。