Atthebeginningofthiscenturymedicalscientistsmadeaninterestingdiscovery;wearebuiltnotjustoffleshandbloodbutalsooftime.Theyweretoshowthatweallhave“abodyclock”uswhichcontrolsthe

　　Atthebeginningofthiscenturymedicalscientistsmadeaninterestingdiscovery;wearebuiltnotjustoffleshandbloodbutalsooftime.Theywere toshowthatweallhave“abodyclock” uswhichcontrolsthe andfallofourbodyenergies usdifferentfromonedaytothenext.

　　The of“abodyclock”shouldnotbetoo sincethelivesofmostlivingthingsarecontrolled the24hournight-and-daycycle.Wefeel andfallasleepatnightandbecome andenergeticduringtheday.Ifthe24hour-cycleis mostpeopleexperienceunpleasant .Forexamplepeoplewhoarenot toworkingatnightcanfindthat ofsleepcausesthemto badlyatwork.

　　thedailycycleofsleepingand wealsohaveothercycleswhich longerthanoneday.Mostofuswould thatwefeelgoodonsomedaysandnotsogoodon ;sometimesourideasseemtoflowandatothertimesthey donotexist.

　　小题1:A．anxiousB．ableC．carefulD．proud小题2:A．insideB．aroundC．betweenD．on小题3:A．movementB．supplyC．useD．rise小题4:A．showingB．treatingC．makingD．changing小题5:A．inventionB．opinionC．storyD．idea小题6:A．difficultB．excitingC．surprisingD．interesting小题7:A．fromB．byC．overD．during小题8:A．dullB．tiredC．dr