Ready，Set，Jump!Forskydivers，theskyisn'tthelimit．It'sjustthebeginning．Thousandsifpeopletryskydivingeachyear．Someonlyjumponce，whileothersgoontoexperiencelifelongadventures，flyingandturningoverthroughtheair

　　Ready，Set，Jump!

　　Forskydivers，theskyisn'tthelimit．It'sjustthebeginning．Thousandsifpeopletryskydivingeachyear．Someonlyjumponce，whileothersgoontoexperiencelifelongadventures，flyingandturningoverthroughtheair．

　　Skydivingisamethodofleavinganairplaneandreturningtotheearthwiththehelpofgravity，thenslowingdownbyusingaparachute （降落伞）．Itmayincludemoreorlessfree-fall，atimeduringwhichtheparachutehasnotbeenusedandthebodygraduallyaccelerates （加速） tothehighestspeed．

　　Therearethreechoicesforthebeginners．However，beforeyoutryskydiving，agroundcourseonsafetyisrequired．Thefirstmethodisacceleratedfree-fall．Youjumpoutoftheplanewhilebeingheldbytwocoaches，oneoneitherside．Theyholdontoyouuntilyouopenyourparachute．Thesecondmethodiscalledstaticline．Afterjumpingout，youwillexperiencefree-fallforasecondortwo．Thentheweightofyourbodywillpullthelinetight，openingtheparachute．

　　Tandem （串联） isthemostpopularbecauseitistheeasiest．Youandthecoachare

　　tiedtogether，thecoachbehind，withyouinfront．Youjumpoutoftheplanetogether，andthecoachtakescareofopeningtheparachute．

　　Foreachofthesethreemethods，thecoachesgiveinstructionsintheairwithhand

　　signals （信号） oraradio．Ifyouareeagertotrysomethingchallengingandwouldlovetofeelthefreedomofflying，skydivingmightbeanadventureforyou．Whoknows？Withriskandexcitementmixedtogether，skydivingmightjustchangeyourlife．

　　61．Dothousandsofpeopletryskydivingeachyear？___

　　62．Howmanychoicesarethereforthebeginners？___

　　63．Whyistandemthemostpopular？___

　　64．Howdothecoachesgiveinstructionsintheair？___

　　65．Whatisthepassagemainlyabout？___．