求租英语完形填空正确答案Scientistsissuedreportsonthesevereclimatechangesthatcouldresult__21__the“greenhouseeffect”—thegradual__22__oftheatmospherecausedbyanincreaseincarbondioxide__23__fromtheburningof

　　求租英语完形填空正确答案

　　Scientistsissuedreportsonthesevereclimatechangesthatcouldresult__21__the“greenhouseeffect”—thegradual__22__oftheatmospherecausedbyanincreaseincarbondioxide__23__fromtheburningoffossilfuels,sayingthat__24__globaltemperaturescouldstarttorisewithinafewdecadesandreachlevelsninedegreesFahrenheithigherthantoday’stemperaturesbytheendofthenextcentury.This,expertssaid,couldcreatedangerouschangestoglobalweather__25__.Forinstance,itcouldchangeannualamountsofrainfall,swellordryuprivers,and__26__theleveloftheseas.

　　While_27__thatthisforecastwassomewhatuncertain,scientistswarned__28__treatingitasacryofwolf.Althoughthereis__29__debateoverhowseverethegreenhouseeffectwillbe,onethingseemscertain:Carbondioxidelevelsare__30__therise.

　　21.A.aboutB.ofC.inD.from

　　22.A.coolingB.warmingC.hottingD.freezing

　　23.A.levelB.degreeC.extentD.range

　　24.A.commonB.usualC.averageD.ordinary

　　25.A.styleB.typeC.patternD.form

　　26.A.riseB.ariseC.arouseD.raise

　　27.A.admittingB.admittedC.havingadmittingD.beingadmitted

　　28.A.againstB.aboutC.ofD.for

　　29.A.considerateB.consideringC.considerableD.considered

　　30.A.ofB.forC.inD.on