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1、课时跟踪练(一)Warm-up&Lesson1—Pre-readingⅠ.阅读理解ATherewasatimewhenatriptothesupermarketintheUnitedStatesoftenendedwithaseeminglysimplequestionfromthecashier(收银员):“Paperorplastic？”Well,whichtypeofbagwouldyouchoose?Whilealltypesofbagshavesomeinfluenceontheenvironment,ithaslon
2、gbeensupposedthatpaperbagsarekinder.Theyaremadefromarenewablesource,breakdowneasily,burnwithoutgivingoffthicksmokeandcanberecycled(回收利用).However,theproducingprocessbehindpaperbagsusesmoreenergythanthatofplasticones.Howcanthisbetrue?Studiesshowthatpaperbagproductionre
3、quiresfourtimesasmuchenergyasplasticbagproduction.Andtheamount(量)ofwaterusedtomakethemistwentytimeshigher.Besides,theinfluenceonforestsisveryserious.Ittakesaboutfourteenmilliontreestoproducetenbillionpaperbags,whichhappenstobethenumberofbagsusedintheUnitedStatesyearl
4、y.Intermsofrecycling,theideathatpaperbagsaremoreenvironmentfriendlythanplasticonescanbequicklydiscarded.Researchshowsitrequiresabout98%lessenergytorecycleplasticthanitdoespaper.Eventhoughpaperbagsmightbemoreharmfulthanplasticones,plasticstillseemstobeconsideredbygove
5、rnmentsasthemoreharmfulofthetwo.InIreland,forexample,atax(税)hasbeenintroducedtodiscouragetheuseofplasticbags.Peoplehavetopay22centsforeveryplasticbag,andasaresult,theirusehasdroppedquickly.There'snodoubtitmakesmoresensetoreusethesebags.However,wedon'tseemtobedoingtha
6、tatpresent.Thatmaybebecausetheyfallapartquickly.Ifso,clothbagsareabetterchoice,butstill,theirproductionalsohasabadinfluenceontheenvironment.Sowhattodo?Howshouldweanswerthequestionof“Paperorplastic？”Itseemsthatwefirstneedtoaskourselvesonemoregeneralquestion:“WhatcanId
7、otohelptheenvironment？”语篇解读：本文是议论文。购物时，应该选用纸袋还是塑料袋，抑或是其他更加环保的方式？作者主要就此进行了探讨。1．ThequestionsinParagraph1areusedto________.A．expresstheauthor'sdoubtsB．tellreadershowtosavemoneyC．introducepointsfordiscussionD．showthekindnessofthecashier解析：选C 写作手法题。作者在首段中通过两个问题，引出了下文要探讨的话
8、题：购物时，应该选纸袋还是塑料袋，到底哪种更环保呢？2．Comparedwithplasticbags,paperbags________.A．needmorewatertoproduceB．requirelessenergytorecycleC．takemor
