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1、Unit4 GlobalwarmingⅠ.阅读理解A(2015陕西,C)Theproductionofcoffeebeansisahuge,profitablebusiness,but,unfortunately,full-sunproductionistakingovertheindustryandbringingaboutalotofdamage.Thechangeinhowcoffeeisgrownfromshade-grownproductiontofull-sunproductionenda
2、ngerstheveryexistenceofcertainanimalsandbirds,andevendisturbstheworld'secologicalbalance.Onalocallevel,thedamageoftheforestrequiredbyfull-sunfieldsaffectsthearea'sbirdsandanimals.Theshadeoftheforesttreesprovidesahomeforbirdsandotherspecies(物种)thatdepend
3、onthetrees'flowersandfruits.Full-suncoffeegrowersdestroythisforesthome.Asaresult,manyspeciesarequicklydyingout.Onamoregloballevel,thedestructionoftherainforestforfull-suncoffeefieldsalsothreatens(威胁)humanlife.Medicalresearchoftenmakesuseoftheforests'pla
4、ntandanimallife,andthedestructionofsuchspeciescouldpreventresearchersfromfindingcuresforcertaindiseases.Inaddition,newcoffee-growingtechniquesarepoisoningthewaterlocally,andeventuallytheworld'sgroundwater.Bothlocallyandglobally,thecontinuedspreadoffull-
5、suncoffeeplantations(种植园)couldmeanthedestructionoftherainforestecology.Thelossofshadetreesisalreadycausingaslightchangeintheworld'sclimate,andstudiesshowthatthelossofoxygen-givingtreesalsoleadstoairpollutionandglobalwarming.Moreover,thenewgrowingtechniq
6、uesarecontributingtoacidic(酸性的)soilconditions.7Itisobviousthatthewaymuchcoffeeisgrownaffectsmanyaspectsoflife,fromthelocalenvironmenttotheglobalecology.Butconsumersdohaveachoice.Theycanpurchaseshade-growncoffeewheneverpossible,althoughatahighercost.Thef
7、uturehealthoftheplanetandmankindissurelyworthmorethananinexpensivecupofcoffee.1.Whatcanwelearnaboutfull-suncoffeeproductionfromParagraph4?A.Itlimitsthespreadofnewgrowingtechniques.B.Itleadstoairpollutionandglobalwarming.C.Itslowsdownthelossofshadetrees.
8、D.Itimproveslocalsoilconditions.2.Thepurposeofthetextisto . A.entertainB.advertiseC.instructD.persuade3.Wheredoesthistextprobablycomefrom?A.Anagriculturalmagazine.B.Amedicaljournal.C.Anengineeringtextbook.D.Atouristguide.4.Whic
