- 阅读理解A
题干：Humanityusesalittlelessthanhalfthewateravailableworldwide.Yetoccurrencesofshortagesanddroughts(干旱）arecausingfamineanddistressinsomeareas,andindustrialandagriculturalby-productsarepollutingwatersupplies.Sincetheworld’populationisexpectedtodoubleinthenext50years，manyexpertsthinkweareontheedgeofawidespreadwatercrisis.Butthatdoesn'thavetobetheoutcome.Watershortagesdonothavetotroubletheworld-ifwestartvaluingwatermorethanwehaveinthepast.Justaswebegantoappreciatepetroleummoreafterthe1970soilcrises,todaywemuststartlookingatwaterfromafresheconomicperspective.Wecannolongeraffordtoconsiderwateravirtuallyfreeresourceofwhichwecanuseasmuchaswelikeinanywaywewant.Instead，forallusesexceptthedomesticdemandofthepoor，governmentsshouldpricewatertoreflectitsactualvalue.Thismeanschargingafeeforthewateritselfaswellasforthesupplycosts.Governmentsshouldalsoprotectthisresourcebyprovidingwaterinmoreeconomicallyandenvironmentallysoundways.Forexample,oftenthecheapestwaytoprovideirrigation(灌慨）waterinthedrytropicsisthroughsmall-scaleprojects,suchasgatheringrainfallindepressions(凹地）andpumpingittonearbycropland.Nomatterwhatstepsgovernmentstaketoprovidewatermoreefficiently，theymustchangetheirinstitutionalandlegalapproachestowateruse.Ratherthanspreadcontrolamonghundredsoreventhousandsoflocal，regional，andnationalagenciesthatwatchvariousaspectsofwateruse，countriesshouldsetupcentralauthoritiestocoordinatewaterpolicy.
题目：What is the real cause of the potential water crisis? - A 、The world population is increasing faster and faster.
- B 、Half of the world's water resources have been seriously polluted.
- C 、Humanity has not placed sufficient value on water resources.
- D 、Only half of the world's water can be used.
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参考答案【正确答案：C】
推理题。首段末句指出：许多专家认为人类正处于大规模缺水的边缘。第二段开始部分指出：如果我们开始比过去更珍惜水，世界范围的水危机就不会出现。由此可见, 人类没有对水给予足够的珍惜。故C选项正确。
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