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1、BOOK1UNIT3JourneyDowntheMekongPart1ThedreamandtheplanMynameisWangKun.Eversincemiddleschool,mysisterWangWeiandIhavedreamedabouttakingagreatbiketrip.Twoyearsagosheboughtanexpensivemountainbikeandthenshepersuadedmetobuyone.Lastyear,shevisitedourcousins,DaoWeiandYuHangattheircollegeinKunming.T
2、heyareDaiandgrewupinwesternYunnanProvinceneartheLancangRiver,theChinesepartoftheriverthatiscalledtheMekongRiverinothercountries.WangWeisoongottheminterestedincyclingtoo.Aftergraduatingfromcollege,wefinallygotthechancetotakeabiketrip.Iaskedmysister,“Wherearewegoing?”Itwasmysisterwhofirsthad
3、theideatocyclealongtheentireMekongRiverfromwhereitbeginstowhereitends.Nowsheisplanningourscheduleforthetrip.Iamfondofmysisterbutshehasoneseriousshortcoming.Shecanbereallystubborn.Althoughshedidn’tknowthebestwayofgettingtoplaces,sheinsistedthatsheorganizethetripproperly.NowIknowthattheprope
4、rwayisalwaysherway.Ikeptaskingher,“Whenareweleavingandwhenarewecomingback?”Iaskedherwhethershehadlookedatamapyet.Ofcourseshehadn’t;mysisterdoesn’tcareaboutdetails.SoItoldherthatthesourceoftheMekongisinQinghaiProvince.Shegavemeadeterminedlook--thekindthatsaidshewouldnotchangehermind.WhenIto
5、ldherthatourjourneywouldbeginatanaltitudeofmorethan5,000meters,sheseemedtobeexcitedaboutit.WhenItoldhertheairwouldbehardtobreatheanditwouldbeverycold,shesaiditwouldbeaninterestingexperience.Iknowmysisterwell.Onceshehasmadeuphermind,nothingcanchangeit.Finally,Ihadtogivein.Severalmonthsbefor
6、eourtrip,WangWeiandIwenttothelibrary.Wefoundalargeatlaswithgoodmapsthatshoweddetailsofworldgeography.FromtheatlaswecouldseethattheMekongRiverbeginsinaglacieronamountaininQinghaiProvince.Atfirsttheriverissmallandthewaterisclearandcold.Thenitbeginstomovequickly.Itbecomesrapidsasitpassesthrou
7、ghdeepvalleys,travelingacrosswesternYunnanProvince.Sometimestheriverbecomesawaterfallandenterswidevalleys.WewerebothsurprisedtolearnthathalfoftheriverisinChina.AfteritleavesChinaandhighaltitude,theMekongbecomeswide,brownandwarm.AsitentersSoutheastAsia,itspaces
