thateatingchocolatemayalsomakepeoplecleverer.

Dr.BryanRaudenbushrecentlymadeastudytoseeifeatingchocolatecanmakepeoplecleverer.The

U.S.scientistknewthatchocolatehadseveralstimulants(兴奋剂).Buthewasnotsurehowthesestimulants

didtheirjobandthusmadepeopleclever.

Tofindout,Dr.Raudenbushgavethefirstgroupofpeople85gofmilkchocolatetoeatandthesecond

groupatenochocolateatall.After15minutes,hetestedtheirmemory,andhealsotriedtoseeiftheywere

abletodealwithproblemsright.

Thefirstgrouphadhigherscores.Theywereabletoremembermorewordsandpicturesthanthesecond

group,andtheycouldsolve(解决)problemsmuchfaster.Dr.Raudenbushthendecidedthatthestimulants

inchocolatecouldmakepeopledothingsfasterandbetter.Andhesuggestedthatifpeoplewantedtodoa

betterjob,eatingchocolatefromtimetotimemaybeofhelp.

Ofcourseeatingchocolatecan'tmakesurethatyoucanstudywellwithouthardwork.You'llstillneed

tostudyhardtogetgoodresults.

B.excited

C.funny

D.crazy

B.hewasn'tsurehowmanypeoplewantedtoeatchocolate

C.heknewitwasakindofgoodfood

D.hewantedtoknowifthestimulantscouldhelppeopledothingsbetter

B.thefirstgroupdidthingsaswellasthesecondgroup

C.bothgroupsdidn'tdothingswell

D.thefirstgroupdidthingsbetterthanthesecondgroup

B.becomecleverer

C.gr