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1、Unit22EnvironmentalProtectionⅠ.阅读理解(共15小题；每小题2分，满分30分)ATreesareusefultomaninthreeimportantways:theygivehimwoodandotherusefulthings,theygivehimcoolplaces,andtheyhelptostopdroughtandflood.Unluckily,inmanypartsoftheworld,manhasnotfoundthatthethirdofthesepointsisthemostimportant.M
2、anwantstomakemoneyfromtrees,sohehascutthemdowninlargenumbers,onlytofindthatwithoutthemhehaslostthebestfriendshehad.Andalso,heisusuallytoocarelesstoplantandlookafternewtrees.Sotheforestsslowlydisappear.Thisdoesnotonlymeanthatmanwillhavefewertrees.Theresultsareevenworse:forwhere
3、therearetrees,theirrootsbreakupsoil－maketherainin－andalsobind(凝固)thesoil,thusstoppingitfrombeingwashedawayeasily;butwheretherearenotrees,therainfallsonhardgroundandflowsaway,causingfloodsandcarryingawaytherichtopsoil.Whenallthetopsoilisgone,nothingisleftbutuselessdesert.【语篇解读】
4、 本文是一篇说明文。文章告诉我们树木对人类有三种重要的用处，人类却不合理的对待树木以至于森林慢慢减少并且给人类带来洪涝干旱等灾害，同时文章也暗示我们要保护森林使其免遭大量的砍伐。1．Themostimportantpointsoftreestomanis________.A．theyhelphimtomakemoneyB．theygivehimcoolC．theygivehimwoodandotherthingsD．theyhelphimtostopdroughtandfloods【解析】 细节理解题。根据文章第一段和第二段第一句Unluckily
5、,inmanypartsoftheworld,manhasnotfoundthatthethirdofthesepointsisthemostimportant.可知树木对人类最重要的一点是他们能帮助人类阻止干旱和洪水。故选D。【答案】 D2．Inmanyplacesforestsslowlydisappearbecause________.A．manytreeshavebeencutdownbymanB．newtreesarenotwelllookedafterC．manhasnotpaidenoughattentiontoplantingtre
6、esD．alltheabove【解析】 细节理解题。根据第二段Manwantstomakemoneyfromtrees,sohehascutthemdowninlargenumbers,onlytofindthatwithoutthemhehaslostthebestfriendshehad.Andalso,heisusuallytoocarelesstoplantandlookafternewtrees.Sotheforestsslowlydisappear.描述可知选项A、B、C都是人为的造成许多地方森林慢慢消失的原因。故选D。【答案】 D3．
7、Landbecomesdesertafteralltreesarecutdownbecause________.A．rootsoftreesbreakupthesoilB．therearetoomanyrainfallsC．strongwindsbringalotofsandD．therearenolongertreestokeeptherainandprotectthetopsoil【解析】 细节理解题。根据文章最后一段描述可知当所有的树木被砍伐后陆地就会变成荒漠是因为再也没有树木保留住雨水和保护表层土壤。故选D。【答案】 D4．Whichtit
8、lebestfitsthepassage?A．TreesandManB．TheFunctionofTreeWoodC．Ho
