AAaronRalstona27-year-oldsportsfanfromAmericafoundhimselfinaverydifficultsituationaloneinacanyoninthedesertwhenahugerockcamecrashingdownthecanyon

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　　      AaronRalstona27-year-oldsportsfanfromAmericafoundhimselfinaverydifficultsituationaloneinacanyoninthedesertwhenahugerockcamecrashingdownthecanyonsmashed(重击)hisrighthandandtrappeditagainstthecanyonwall.What's worseRalstonhadfailedtotellanyonewherehewasgoing.Atthelastminutetheplansforatripwithhisclimbingpartnershadcometonothingandhehaddecidedtoheadoutonhisowntowalkdownthecanyon.

　　      AfterthreedaysofnotseeingorhearinganysignoflifeRalstonrealisedhewoulddiethereifhedidn'tdosomethingspecial.Thecourseofactionwasterrifyingbuttherewasnootherway.Hewouldhavetocutoffhisrighthand.Fortunatelyhehadasmallknifeandsome.straps(带子)withhimthathecouldusetostophimselfbleedingtodeath.

　　     Hefoundthecouragetousetheknifetocutthroughtheskinbutsoonherealisedthatitwasgoingtobeimpossibletousehissmallknifetocutthroughthebones.:Afteranother24hoursofpainanddespairtheideaand;thestrengthcametohiminaflashonthesixthday.Withafinalburstofenergyhebrokehisarmandfreedhimself.

　　     Ralstonbelievesthathisstorywasnotsimplyabout:anisolatedindividualwhorosetoatoughchallengeFor;himtherewasanotheraspectoftheexperience.HesaidThesourceofthepowerIfelttosurvivewasmyfamily.Iappreciateallthattheydo.”

　　1.WhydidRalstondealwiththedifficultsituationalone?

　　   A.Hispartnersgotlostinthedesert.

　　   B.Hedidn'tliketravelingwithothers.

　　   C.Hispartnersgaveuptravelingwithhim.

　　   D.Hisfriendswerefrightenedawaybyhisaccident.

　　2.HowdidRalstonfreehisarmfromtherockonthelastday?

　　   A.Bybreakingbonesinhisarm.

　　   B.Bygraduallypushingtherock.

　　  C.Bypullingtherockwithstraps.

　　   D.Byreceivinghelpfromastranger.

　　3.Thetext mainlytellsusabout____.

　　   A.howRalstonwalkeddownthecanyon

　　   B.thereasonwhyRalstonwenttothetrip

　　   C.howRalstonsurvivedfromatoughsituation

　　   D.differentwaystodealwithRalston'sproblems

　　4.Wheredoesthistextprobablycomefro