AbouthalfAmericanteenagersdonotgetenoughsleeponschoolnights.Theygetanaverageofsixtytoninetyminuteslessthanexpertssaytheyneed.Onereasonforthisisbiology.Expertssayteensarebiologicallyprogrammedtogoto
AbouthalfAmericanteenagersdonotgetenoughsleeponschoolnights.Theygetanaverageofsixtytoninetyminuteslessthanexpertssaytheyneed.
Onereasonforthisisbiology.Expertssayteensarebiologicallyprogrammedtogotosleeplaterandwakeuplaterthanotheragegroups.Yetmanyschoolsstartclassesasearlyasseveninthemorning.Asaresult，manystudentsgotoclassfeelinglikesixteen?year?oldDanny.Heisanactiveteen—exceptinthemorning.“Gettingupinthemorningisprettyterrible.I’mjustveryoutofitandtired.ThroughthefirstandsecondperiodIcanhardlystayawake”hesaid.
MichaelBreusisapsychologist.Teens，hesays，needtosleepeighttoninehoursorevenninetotenhoursanight.Hesayssleepyteenscanexperienceaformofdepression(消沉)thatcouldhavebiginfluenceontheirgeneralwellbeing.Itcanaffectnotjusttheirabilityintheclassroombutalsoonthesportsfieldandontheroad.Sowhatcanschoolsdoaboutsleepystudents？Thepsychologistsaysonethingtheycandoistostartclasseslaterinthemorning.Studiesshowthatstudentscanimprovebyafulllettergradeintheirfirstandsecondperiodclasses.
EricPetersonistheheadofSt.George’sSchoolinthenortheasternstateofRhodeIsland.Hewantedtoseeifathirty?minutedelay(推迟)wouldmakeadifference.Itdid.Hesaysvisitstothehealthcenterbytiredstudentsdecreasedbyhalf.Latearrivalstothefirstperiodfellbyathird.Andstudentsreportedthattheywerelesssleepyduringtheday.EricPetersonknowsthatchangingstarttimesiseasieratasmallschoollikehis.Butheishopefulthatotherschoolswillfindaway.
1.What’sthebesttitleforthepassage?
A．Laterclasses，fewersleepyteens
B．Earlybirdshavegoodfood
C．Earlytobedandearlytorise
D．Fewerclasses，morehappiness
2.Theunderlinedword“this”inthesecondparagraphrefersto________.
A．teenagers’stayingup
B．teenagers’gettinguplate
C．teenagers’notgettingenoughsleep
D．teenagers’notstudyingseriously
3.MichaelBreusthinksthat________.
A．teensshouldgetupearly
B．teensneedenoughsleeptobelively
C．depressioniscommoninteens