[单选]  二、阅读理解阅读下面的文章，根据文章内容，完成相应的选择题。（每题10分）　　TheroadsysteminBeijing'scentralbusinessdistrict(CBD)isbeingre-designedtomakepublictransportationeasyandimproveefficiency.　　Plansfor45roadswithintheCBDhavebeenapproved,measuring41.5kilometersintotal.Inadditiontopublicbuses,freeorlowpriceshuttlebusesfromresidenceareastosubwaystationswillalsobeprovidedforcommuters.　　Thisisjustoverfourtimesthenumberofroadsopenedin2007,andwilladdanother15.5kmtotheexistingroadnetwork.　　Besidesroads,anundergroundtrafficsystemhasalsobeenoperating,whichincludesfournewsubwaylinesbeneaththeCBD.　　Theundergroundconnectionsystemismadeupoftwolevels.Thefirstundergroundfloorissetasidemainlyforpedestriansandcommercialfacilities,whilethesecondundergroundfloorisplannedforparking.　　Thecityhasalsoinvested140millionyuantosetupatrafficinquirysystem,throughwhichthepubliccanchecktrafficconditionsonlineandseethemostconvenientroutesontheirGPSsystem.Inthefuture,theCBDwillbefullycoveredbyanintelligenttrafficcontrolsystem.　操作提示：通过题干后的下拉框选择题目的正确答案。TheroadsysteminBeijing'sdowntownareaisbeingtomakepublictransportationeasyandimproveefficiency.   　A.built　B.designedagain　C.constructed2.AnundergroundsystemincludingnewsubwaylinesbeneaththeCBDhasbeenoperating.   　A.2　B.3　C.43.Theundergroundconnectionsystemconsistsof_____level(s).   　A.one　B.two　C.three4.CBDstandsfor_____.   　A.CentralBusinessDistrict　B.ConventiononBiologicalDiversity　C.ChemistryandBiomedicalEngineering5.Beijinghassetup_______forpeopletochecktrafficconditions.   　A.trafficlights　B.undergroundfloor　C.atrafficinquirysystem