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 本文屬于說明文．介紹了走近大自然，去體驗和感悟自然的美，徒步旅行需要注意的問題以及對我們的好處，并強調(diào)一定要付諸行動，而不僅僅是暢想．

解答 71--75 CDFAB
71．C．考查上下文的理解能力．根據(jù)后面的This recreation promotes physical，mental and community health，and also wins points for what it doesn't offer可知，城區(qū)徒步旅行能帶來意想不到的興奮和刺激；故選C．
72．D．考查上下文的理解能力．劃線前面講解的是徒步旅行之前的裝備準備，后面的內(nèi)容為旅行地點的選擇；所以D項Once equipped，figure out where to go能夠起到承上啟下的作用；故選D．
73．F．考查上下文的理解能力．根據(jù)最后的描述digging into a park can let your ears and eyes escape the urban environment．可知，與城市的喧囂和擁擠相對比的是大自然的寧靜和舒適，所以選F以自然風景作為旅行的終點．
74．A．考查上下文的理解能力．此處強調(diào)的是與家人一起去旅行，那么對于走近大自然的孩子的好處就是眼界開闊，思維敏捷，在校的表現(xiàn)有可能會更好，所以選A．
75．B．考查上下文的理解能力．根據(jù)后面的建議Just explore．可知，光有計劃還是不夠的，關(guān)鍵是走出去，所以徒步旅行是一種旅行，而不僅僅是計劃；故選B．

點評 對于選句填空這種題型要搞明白上下文之間的邏輯關(guān)系，要根據(jù)對話者所說的語氣及語義關(guān)系來做出判斷；只要符合文章的結(jié)構(gòu)、通順合理即可．

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