阅读理解TheThreeGorges(三峡)Damthelargestdamintheworldisalsothelargestengineeringprojectonthefaceoftheearth.ItaimstomakethemotherofallfloodstheChangjiangRiverintoatamefiveranditwi

　　阅读理解

　　TheThreeGorges(三峡)Damthelargestdamintheworldisalsothelargestengineeringprojectonthefaceoftheearth.ItaimstomakethemotherofallfloodstheChangjiangRiverintoatamefiveranditwillbethelargestpowersourceformuchofeasternandcentralChina.Itwillcreateahugedeep-waterlakeandmakeitpossiblefor10000tonocean-goingshipstosail15000milesinlandfromthePacifictothecityofChongqingwithits30millionpeoplemakingittheworld'slargestriverport.

　　Constructionhasalreadystarted.Thedamwillbeabout6860feetlongand611feethighataspotcalledSandoupingnearYichang.

　　Aftermanyyearsofinvestigation(调研)expertshavedrawnaconclusionthatthisgrandprojectwilldoagreatdealofgood.Themostimportantthingisfloodcontrol.BybuildingadaminsteadofnewcoalplantstomeetitsgrowingdemandforelectricityChinawillgiveoffmuchlesspoisonousgasesintothedir.

　　Howeversomescientistsdon'tagreetotheproject.TheysaythatChongqinganddozensofothercitiesalongtheriverwillputmuchwasteintothereservoir(水库)whichcandoharmtopeoplefishandotherlivingthingsthatdependontheriver.Sedimentation(沉积)anddamageofabreach(决口)areproblemstoo.

　　TheThreeGorgesDamcouldbeconsideredwhenitisfinishedin2009aneweighthwonderoftheworldastothesizealone.

　　1．Whichisnotthepurposetobuildsuchahugedam?

　　[]

　　A．Tomakeelectricity.

　　B．Topreventfloods.

　　C．Toimprovenavigation(运输)

　　D．Tomakeitawonder.

　　2．Wheredoesthedamlie?

　　[]

　　A．NearChongqing.

　　B．NearYichang.

　　C．IntheThreeGorges.

　　D．InWuhan.

　　3．Itwilltakeabout________tocompletethedam.

　　[]

　　A．eightyears

　　B．morethantenyears

　　C．halfacentury

　　D．morethantwentyyears

　　4．Somescientistsfearthat________.

　　[]

　　A．whenthedamisbuiltthebalanceofnaturemaybedestroyed

　　B．sedimentationmayoccur

　　C．abreachmaycausemillionsofpeopletodieortobehomeless

　　D．electricity