Sleepissomethingwealldo.Butsomepeopleneedtosleepmorethanothers.Babiessleepmostofthetime.Childreninschoolsleepabouttentotwelvehoursanight.Mostgrown-upssleeponlysevenoreighthours.小题1:Allpartsof
Sleepissomethingwealldo.Butsomepeopleneedtosleepmorethanothers.Babiessleepmostofthetime.Childreninschoolsleepabouttentotwelvehoursanight.Mostgrown-upssleeponlysevenoreighthours. 小题1:
Allpartsofourbodieshavetorestaftertheywork.Ourarmsneedarestafterweliftheavythings.Whenwerunfast,ourlegsworkhard.Theygettired.Wehavetorestthem.Ourbrainsworkhard,too. 小题2:72 Wecansitquitestillandrestourarmsandlegs.Butourbrainsaren’tresting.Theygorightonthinkingaslongasweareawake.
Ourbrainsslowdownabitwhenwesleepanddream. 小题3: Insteadofthinkingwide-awakethought,ourbrainsmakeupdreams.Somedreamsareverypleasing.Somearenot.Mostofthetimeweforgetthemwhenwewakeup.
Scientistshavetriedtofindoutwhatwouldhappenifpeoplewerenotallowedtosleep.Theyaskedsomepeoplenottogotobed.Thepeoplestayedupallnightandallthenextday.Theystayedupthenextnight,tooandthedayafter.Theyplayedgames.Buttheymademistakes.Theyforgotthings. 小题4: .Thepeoplegrewrudeandmean.Theybecameangrywiththeirfriends.Finallytheyweretootiredtostandup.Themomenttheysatdown,theyfellasleep.
Scientistsfoundthatifpeoplearenotallowedtosleep,theyactinanunusualway.
小题5: Butwedoknowthatweneedittostaywell.
Sotonighthaveagoodsleep.Liedownunderthecovers.Shutyoureyes.Letyourthoughtstravelabout.Soonyou’llstopthinking.You’llbeasleep.A.Butevenaswesleepourbrainsaredoingsomework.B.Itwashardfortheirtiredbrainstowork.C.Whenweareawake,theyhelpuspayattentiontotheworldaroundus.D.Nooneknowsquitesurelywhysleepissogoodforus.E.Goodsleephelpstoimproveone’smemory.
F.Butbabies,childrenandgrown-ups----allofusneedtohaveoursleep.