18．（71）C This recreation promotes physical，mental and community health，and also wins points for what it doesn't offer．Here's everything you need to know before hitting the trail or sidewalk．
Bring water，a snack，and good comfortable shoes．A lot of pepole have unrealistic understanding of what comfortable shoes mean； actually hiking boots are very necessary．（72）D Experienced hikers recommend tailoring your route to fit an interest，like architecture，food or a view．
（73）F In modern urban city，you've kept away from trees and maybe birds most of the time．Although cool buildings，coffee shops and paths leading into handsome parks are your daily choices for trips，digging into a park can let your ears and eyes escape the urban environment．
Consider inviting company on your urban hike，starting with family． （74）AIt's so important that people understand this is not a foreign activity．
Organized hikes and walking clubs provide motivation and an opportunity to learn new routes and meet people．To help people find fellow walkers and nearby routes，the Website of the American Hiking Society offers searchable databases of clubs and trails．（75）BJust explore．That's what I've always done．
A．Children who walk outdoors are more likely to perform well at school．
B．But keep in mind that an urban hike is about the journey，not the planning
C．Urban hikes provide unexpected excitements
D．Once equipped，figure out where to go
E．Listen to music，watch TV or meet your friend at the cinema
F．Choose nature for the destination
G．Guides keep you informed of evens and activities．
分析 本文属于说明文．介绍了走近大自然，去体验和感悟自然的美，徒步旅行需要注意的问题以及对我们的好处，并强调一定要付诸行动，而不仅仅是畅想．
解答 71--75 CDFAB
71．C．考查上下文的理解能力．根据后面的This recreation promotes physical，mental and community health，and also wins points for what it doesn't offer可知，城区徒步旅行能带来意想不到的兴奋和刺激；故选C．
72．D．考查上下文的理解能力．划线前面讲解的是徒步旅行之前的装备准备，后面的内容为旅行地点的选择；所以D项Once equipped，figure out where to go能够起到承上启下的作用；故选D．
73．F．考查上下文的理解能力．根据最后的描述digging into a park can let your ears and eyes escape the urban environment．可知，与城市的喧嚣和拥挤相对比的是大自然的宁静和舒适，所以选F以自然风景作为旅行的终点．
74．A．考查上下文的理解能力．此处强调的是与家人一起去旅行，那么对于走近大自然的孩子的好处就是眼界开阔，思维敏捷，在校的表现有可能会更好，所以选A．
75．B．考查上下文的理解能力．根据后面的建议Just explore．可知，光有计划还是不够的，关键是走出去，所以徒步旅行是一种旅行，而不仅仅是计划；故选B．
点评 对于选句填空这种题型要搞明白上下文之间的逻辑关系，要根据对话者所说的语气及语义关系来做出判断；只要符合文章的结构、通顺合理即可．
