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1、课时跟踪检测(十二) Healthyeating一、语法填空Ayoungmothersetherfeetonthepathwayoflife.“Isthewaylong？”sheasked.Herguidesaid,“Yes,andthewayishard.Youwillbeold__1__youreachtheendofit,buttheendwillbebetterthanthe__2__(begin)．”Theyoungmotherwashappyandwouldn’tbelievethata
2、nythingcouldbebetterthantheseyears.__3__sheplayedwithherchildren,__4__(gather)flowersforthemalongthewayandbathingwiththemintheclearsprings.Thesun__5__(shine)onthem,andlifewasgood.Theyoungmothercried,“Nothingwillbelovelier__6__this.”Thenthenightandthest
3、ormscame,andthepathwasdark.Thechildrenshook__7__fearandcold.Themotherdrewthemclose__8__coveredthemwithhermantle(披风).“Oh,Mother,wearenotafraid,foryouarenear.Weknow__9__harmcancometous.”saidthechildren.Themothersaid,“Thisisbetterthan__10__brightnessofthe
4、day,forIhavetaughtmychildrencourage.”1．________2.________3.________ 4.________5．________6.________7.________ 8.________9．________10.________二、阅读理解APeopleborninwinteraremorelikelytosuffermentalhealthdisorders,accordingtoarecentstudycarriedoutbyresearche
5、rsatVanderbiltUniversityinTennessee.Researchersraisedbabymicefrombirthtoweaning(断奶)ineither“summer”cyclesof16hoursoflightand8hoursofdarkor“winter”cyclesof8hoursoflightand16hoursofdark.Athirdgroupexperienced12hoursoflightand12hoursofdarkaday.Thenhalfthe
6、wintermicestayedinawintercycle,whilehalfswitchedtoasummerschedule.Thesummermiceweresimilarlysplit.Themiceraisedinequalperiodsoflightanddarkweresplitintothreegroups,oneofwhichstayedonthe12hourschedule,oneofwhichjoinedthewintergroup,andoneofwhichjoinedth
7、esummergroup.After28days,itturnsoutthesummerbornmicebehavedthesamewhethertheystayedonthesummercycleorswitchedtowinter.Butamongthewinterbornmice,thosestayedinwinterkepttheirpreviousschedule,whilethosethatswitchedtosummerstayedactiveforanextrahourandahal
8、f,whichindicatesthatmicebornandweanedinawinterlightcycleshoweddramaticdisruptionsintheirbiologicalclocks.Thefindingisthefirstofitskindinmammals,anditcouldexplainwhypeopleborninwinterareathigherriskformentalhealthdisordersincludingbipola
