【2000年1月大学英语四级听力原文WhenIraqitroopsblewuphundredsofKuwaitioilwellattheendofGulfWar,scientistsfearedenvironmentaldisaster.Wouldblackpowderinthesmokefromthefirescirclestheglobeandblockoutthesun?Man】

　　2000年1月大学英语四级听力原文

　　WhenIraqitroopsblewuphundredsofKuwaitioilwellattheendofGulfWar,scientistsfearedenvironmentaldisaster.Wouldblackpowderinthesmokefromthefirescirclestheglobeandblockoutthesun?

　　Manysaid“Noway?;rainwouldwashtheblackpowderfromtheatmosphere.ButinAmerica,airsamplingballoonshavedetectedhighconcentrationsofparticlessimilartothosecollectedinKuwait.didn'tcatchfire.IthasformedhugelakesintheKuwaitidesert.Theytrapinsectsandbirds,andpoisonavarietyofotherdesertanimalsandplants.

　　Theonlygoodnewsisthattheoillakeshavenotaffectedtheundergroundwaterresources.Sofar,theoilhasnotbeenabsorbedbecauseofthehardsandjustbelowthesurface.

　　Nothing,however,stopstheoilfromevaporating.Theresultingpoisonousgasesarechokingnearbyresidents.

　　Officialsaretryingtoorganizeaquickcleanup,buttheyarenotsurehowtodoit.Onepossibillityistoburntheoil.Getthoseblack-powderdetectorsready.

　　18.WhatwerethescientistsworriedaboutsoonaftertheGulfWar?

　　19.Whatwasthegoodnewsforscientists?

　　20.Whataretheofficialstryingtodoatthemoment?

　　20.A)Torestorethenormalproductionoftheoilwells.

　　B)Toestimatethelossescausedbythefires.

　　C)Toremovetheoilleftinthedesert.

　　D)Tousetheoilleftintheoillakes.

　　这道题为什么选择C没明白