Canwehavetoomanyfriends？Howmanyfriendsdoyouhave？Makingalotoffriendsmakesyoupopularatschool．Also，wheneveryouwanttofindsomeoneforhelp，thereisalwaysacertainfriendthere．Nowscientistssuggestthatpartsofthe

　　Canwehavetoomanyfriends？

　　Howmanyfriendsdoyouhave？Makingalotoffriendsmakesyoupopularatschool．Also，wheneveryouwanttofindsomeoneforhelp，thereisalwaysacertainfriendthere．Nowscientistssuggestthatpartsofthebraininthosewithahighernumberoffriendsarelargerthanthosewith （75）___friends．

　　Scientistshavestudiedtheconnectionbetweenbrainsizeandsocialinteractions （互动） onmonkeys．Theyfoundthatpartsofthebraininmoresociablemonkeyswerelarger．Theywerebetter（76）___predictingtheintentions （意图） ofothermonkeys．

　　Asforhumans，theresearchersatMcGillUniversity，Canada，studiedthedifferencesbetweenthosewithlargersocialgroups，andthosewithsmallergroups．Theresearchersstudied18people．Inorderto （77）___thesizeofeachperson'ssocialgroup，thepeoplewereaskedhowmanysocialinteractionsthey'dhadinthepastmonth．

　　Thenresearcherslookedatbrainscans （扫描）．Theyfoundthat，justlikemonkeys，partsofthebraininhumanswithlargersocialgroupswerelarger．

　　Althoughlong-termstudiesareneededtofigureout（78）___socialinteractioncausedthesechangesinthebrain，scientistsweresureaboutonething：Somebrainregionsthatarelargersuggestsotherregionsmightbesmaller，leadscientistMaryAnnNoonansaidtoLiveScience．

　　Forexample，ifyou'respendingalotoftimewithfriends，youwon'thavemuchfreetimetolearnother （79）___，suchasplayingthepiano，Noonansaid．Thesepartsofthebrainstaysmall．

　　Sohavingtoomanyfriendsisnotalwaysgood．（80）___，it'sdifficulttomaintainalotofmeaningfulrelationships．Maybeweshouldsticktoasmaller，butcloser，groupoffriends．

　　75．A） fewerB） betterC） worseD） smller76．A） inB） onC） withD） at77．A） takeoutB） findoutC） putoutD） lookat78．A） thatB） whetherC） whenD） what79．A） skillsB） experience