问题补充：
One of my favourite things to do is hiking in mountains. Because nobody likes the idea of getting lost, I always prepare before every trip. But what’s the best navigation tool, a Global Positioning System (GPS) or a good old map and compass? Five of my friends and I hiked through the mountains on a trail I marked. One team of three carried a GPS, and the other team used a map and compass.
It took the GPS team 3 hours and 11 minutes to get through the whole hike, however, it took the map and compass team only 2 hours and 49 minutes. The biggest problem the GPS team met was that they lost the satellite signal (卫星信号) in some places. With no map or compass, they had to walk around until they were in a place where the signal was good. The map and compass team was able to spot (认出) different landmarks, compare them to their maps and then use the compass to point them in the right direction.
When I head out on my future hikes, I’m bringing a map, a compass and a GPS to show me the way.
【小题1】The writer prepares before every trip because he doesn’t . A．like the old map or compassB．know how to use the GPSC．want to get lost in mountainsD．want to get into the mountains alone【小题2】The two teams . A．had the same navigation toolB．went along the same trailC．had the same problem D．finished the whole hike at the same time【小题3】In the end, the writer found out . A．the map and the compass were too old navigation tools to use any moreB．it wasn’t necessary to bring a map and a compass together with a GPSC．the GPS had some bad points in hiking in mountainsD．he wouldn’t use a GPS any moreC
答案：
(答案→)C
解析：这篇短文中作者主要介绍了全球定位系统和地图加指南针这两对组合在徒步旅行中的优缺点问题。
【小题1】根据第一段Because nobody likes the idea of getting lost, I always prepare before every trip. 描述，可知选C。
【小题2】根据第二段It took the GPS team 3 hours and 11 minutes to get through the whole hike, however, it took the map and compass team only 2 hours and 49 minutes.描述，可知他们走的是同一条路线，故选B。
【小题3】根据The biggest problem the GPS team met was that they lost the satellite signal (卫星信号) in some places.描述，可知他发现GPS定位系统有很多盲点，故选C。
