AAstrangethinghappenstonearlyeverybodyatnight.Theyturnoffthelights,putupthecoversandclosetheireyes.Sixorsevenhourslater,theywakeupagain.Strange,isn’tit?Sleeppuzzlesscience.Scientistsanddoctorswouldrathertalkaboutwhyonecan’tfallasleep.Theyarenotsosurewhatcausessleep.Thebestconditionsforsleep,theysay,aregoodhealthandmealneithertoobignortoosmall.Noworriesandacomfortableplacetosleepinareimportant,too.Theyadviseagainsttwoinonebed.Strangethingshappenduringsleep.Forexample,youmoveoften.Youwouldfeeltiredifyoudidn’t.Youalsodream.Partofyourbrainisstillawakewhenyoudream.Dreaminghappenswhenthememoryandimaginationpartsofyourbrainarestillawake.Experimentshaveshownthatbaddreamsmaybecausedbyastomachache.Don’tworryifyoudream.Somegreatstoriesandpoemswerebegunwhilethewritersslept.41.Sleeppuzzlesscientistsbecausetheyarenotcertain_______.A.whyonecan’tfallasleepB.whyonewakesupsixorsevensleepinghourslaterC.bothAandBD.whatcausessleep42.Youwouldfeeltiredduringsleepifyou________.A.moveoftenB.sleeponyourbackC.didn’tmoveD.wentbacktoolater43.Dreaminghappenswhen_______.A.youareinadeepsleepB.youarenotcomfortableC.partofourbrainisstillawakeD.there’stoomuchnoiseintheroom44.Thebesttitleforthispassageis________.A.WhyYouDreamB.TheStrangenessofSleepC.WhatHappensDuringSleepD.TheCauseofSleepBInrecentyearsadvancesinmedicaltechnologyhavemadeitpossibleforpeopletolivelongerthaninthepast.Newmedicinesandmachinesarebeingdevelopedeverydaytoextendlife.However,somepeople,includingsomedoctors,arenotinfavoroftheselifeextendingmeasures,andtheyarguethatpeopleshouldhavetherighttodiewhentheywant.Theysaythatthequalityoflifeisasimportantaslifeitselfandthatpeopleshouldnotbeforcedtogoonlivingwhenconditionsoflifehavebecomeunbearable.Theysawthatpeopleshouldbeallowedtodiewithdignity(尊严)andtodecidewhentheywanttodie.Othersarguethatlifeunderanyconditionsisbetterthandeathandthatthedutyofdoctorsisalwaystoextendlifeaslongaspossible.Andsothebattlegoesonandonwithoutadefiniteanswer.45、Thebesttitleforthispassageis_____.A.TheRighttoLiveB.TheRighttoDieC.TheDoctor’sDutyD.LifeIsBetterThanDeath46、Inrecentyears,peoplecanlivelongerthaninthepast.It’sbecauseof_____.A.thedevelopmentofmedicaltechnologyB.bighospitalsC.gooddoctorsD.bothBandC47、Accordingtosomepeoplewhetheradyingpatienthastherighttodieornotisupto___________.A.thedoctorsB.thesurroundingsC.hisorherfamilyD.thepatienthimselforherself48、Inthewriter’sopinion_____.A.deathisbetterthanlifeB.lifeisbetterthatdeathC.neitherdeathnorlifeisgoodD.noneoftheaboveCLillianHanson,acollegestudent,expectstograduateinabouttwoyears.WhatmakesMrs.Hansondifferentfromherclassmatesisherage-----73years.Shehasbeenstudyingatcollege,afewcoursesatatime,for27years.WhenLillianHansongraduatedfromhighschool,shewenttothebanktoborrowmoneyforfurthereducation.Thebankergavehernoencouragement.Hedidn’tthinkthatacountrygirlshouldborrowmoneytogotocollege.Hethoughtsheshouldbeathomedoingworkinthehouseoraroundthefarm.SoLillianHansonwenthomeandraisedafamilyofninechildreninsteadofgoingtocollege.Mrs.Hansonneverforgotherdreamofgettingahighereducation.Whenherchildrenweregrown,shetriedagain.Shefindsthatitisthehardestpartofgoingbacktoschoolatheragetositinclassforlongperiodsoftime.Becausesheisnotasquickassheusedtobe,Mrs.Hansonoftengetsupandwalksaroundclassestokeepfromgettingstiff(不灵活).Atthebeginningofacourseinusingthecomputer,...
