【TheThreeGorgesDam（三峡大坝），thelargestdamintheworld，isalsothelargestengineeringprojectonthefaceoftheearth．Itaimstomakethemotherofallfloods，theYangtzeRiver，intoatameriver，makeelectr】

　　TheThreeGorgesDam（三峡大坝），thelargestdamintheworld，isalsothelargestengineeringprojectonthefaceoftheearth．Itaimstomakethemotherofallfloods，theYangtzeRiver，intoatameriver，makeelectricityandpowermuchofeasternandcentralChinawithits18，200megawatts（兆瓦）electricity．Itwillcreateahuge，deepwaterlake，andmakeitpossiblefor100，000tonocean-goingshipstosail1，500milesinlandfromthePacifictothecityofChongqingwithits15millionpeople，makingittheworld'slargestseaport．

　　Constructionhasalreadystarted．Thedamwillbeabout6，860feetwideand611feethigh，ataspotcalledSandoupingnearYichang．Itisobviousthatsuchagrandprojectwilldoagreatdealofgood．Mostimportantisfloodcontrol．Bybuildingadaminsteadofnewcoalplantstomeetitsgrowingdemandforelectricity，Chinawillgiveoffmuchlesspoisonousgasesintotheair．

　　However，somescientistsdon'tagreetotheproject．TheysaythatChongqinganddozensofothercitiesalongtheriverwillputmuchwasteintothereservoir（水库），whichcandoharmtopeople，fishandotherlivingthingsthatdependontheriver．Sedimentation（深积）andthedamageofabreach（决口）areproblems，too．TheThreeGorgesDamcouldbeconsidered，whenitisfinishedin2009，aneweighthwonderoftheworldastosizealone．

　　1．Whichisnotthepurposetobuildsuchahugedam？

　　A．Tomakeelectricity．

　　B．Topreventfloods．

　　C．Toimprovenavigation（航运）．

　　D．Tomakeitawonder．

　　2．Wheredoesthedamlie？

　　A．NearChongqing．

　　B．NearYichang．

　　C．InChongqing．

　　D．InWuhan．

　　3．What'sthepopulationofChongqing？

　　A．1，500，000．

　　B．150，000，000．

　　C．15，000，000．

　　D．1，500．

　　4．Accordingtothepassage，whichofthefollowingisNOTright？

　　A．ChinawilldependontheYangtzeRiver，thethirdlargestriverintheworld，forelectricity．

　　B．Somescientistshaveconsideredtheeffectsontheenvironmentbeforethedamissetup．

　　C．It'lltakemanyyearstobuildthisdambecausepeoplewanttoseewhetheritwillbesafeandstrongenough．

　　D．Chongqingwillbecomethelargestseaportintheworldwhenthedamisfinished．