高一英语必修一unit3课文journeydownthemekong复述
原文：PART1THEDREAMANDTHEPLAN
MynameisWangKun.Eversincemiddleschool,mysisterWangWeiandIhavedreamedabouttakingagreatbiketrip.Twoyearsagosheboughtanexpensivemountainbikeandthenshepersuadedmetobuyone.Lastyear,shevisitedourcousins,DaoWeiandYuHangattheircollegeinKunming.TheyareDaiandgrewupinwesternYunnanProvinceneartheLancangRiver,theChinesepartoftheriverthatiscalledtheMekongRiverinothercountries.WangWeisoongottheminterestedincyclingtoo.Aftergraduatingfromcollege.wefinallygotthechancetotakeabiketrip.Iaskedmysister,"Wherearewegoing?"ItwasmysisterwhofirsthadtheideatocyclealongtheentireMekongRiverfromwhereitbeginstowhereitends.Nowsheisplanningourscheduleforthetrip.
Iamfondofmysisterbutshehasoneseriousshortcoming.Shecanbereallystubborn.Althoughshedidn'tknowthebestwayofgettingtoplaces,sheinsistedthatsheorganizethetripproperly.Now,Iknowthattheproperwayisalwaysherway.Ikeptaskingher,"Whenareweleavingandwhenarewecomingback?"Iaskedherwhethershehadlookedatamapyet.Ofcourse,shehadn't;mysisterdoesn'tcareaboutdetails.SoItoldherthatthesourceoftheMekongisinQinghaiProvince.Shegavemeadeterminedlook—thekindthatsaidshewouldnotchangehermind.WhenItoldherthatourjourneywouldbeginatanaltitudeofmorethan5,000metres,sheseemedtobeexcitedaboutit.WhenItoldhertheairwouldbehardtobreatheanditwouldbeverycold,shesaiditwouldbeaninterestingexperience.Iknowmysisterwell.Onceshehasmadeuphermind,nothingcanchangeit.Finally,Ihadtogivein.
Severalmonthsbeforeourtrip,WangWeiandIwenttothelibrary.Wefoundalargeatlaswithgoodmapsthatshoweddetailsofworldgeography.FromtheatlaswecouldseethattheMekongRiverbeginsinaglacieronaTibetanmountain.Atfirsttheriverissmallandthewaterisclearandcold.Thenitbeginstomovequickly.Itbecomesrapidsasitpassesthroughdeepvalleys,travellingacrosswesternYunnanProvince.Sometimestheriverbecomesawaterfallandenterswidevalleys.WewerebothsurprisedtolearnthathalfoftheriverisinChina.AfteritleavesChinaandthehighaltitude,theMekongbecomesw