阅读下列四篇短文，从每小题后所给的A,B,C或D四个选项中，选出最佳选项。You’resittingonthetrainhomeandthepersonoppositeyouyawns(打哈欠).Suddenly,you’reyawningwithhim,thoughyou’renottired.Thisphenomenonconfusedscientistsforyearsuntilarecentstudyfoundthatpeopletendtosympathizewithfellowhumans.Supportingthisclaimwasthediscoverythatthosechildrenwhowereunabletoformnormalemotionaltieswithothersdidnotexperiencecontagious(有感染力的)yawning,whichshowedthathumanscommunicateregularlywithoutwords.HugoCritchley,aneuroscientist,hasconductedanexperimentrecently,whichwillprovethathappinessandsadnesscanspreadlikethecommoncold.AccordingtoCritchley,ourmindandbodyareinconstantexchangeabouthowwe’refeeling.“Emotionsarecloselylinkedwithstatesofinternal(内部的)responses,”heexplained.“Therearealsomorevisiblechangesinourgesturesandfacialexpressions.Whenwe’reinagroup,thesesignalscanspreadtoanotherperson.Forexample,there’stheobvioustendencytosmilewhensmiledatandtherearelessobviouschangesthatreflectemotionsofsurprise,angerorsadnesssuchasachangeinourheartrateandbloodpressure.”HugoCritchleyfurtherexplained,“Ourbodiessynchroniseandwhenweliketheotherperson,weevencopyhisbehavior.Nexttimeyouchatwithafriend,takenoteofhowyou’resitting—it’sprettylikelythatyouwillbethesame.Scientistsbelieveit’sourwayoftellingeachotherthatwe’repartners.Throughbodylanguage,humansgiveeachotherverysubtle(微妙的)butclearsignalsthatshowemotions.”So,whatlessonscanwelearnfromthis?“Spendtimewithhappypeople—otherwiseyourhealthcouldsuffer,”saidCritchley.“Whenwe’resad,ourbodygoesintofightorflightmode.Butwhenwe’rehappy,ourbodyworksnormallyandwefeelrelaxedandpositive.Sowelookbright,ourskinglows,wefeelhealthyanditaffectseveryonearoundus.”1.AccordingtoHugoCritchley,.A.emotionsareasvisibleasfacialexpressionsB.weyawnmorefrequentlywhenwehaveacoldC.emotionsareconnectedwithstatesofinternalresponsesD.thechangeofbloodpressureisnotlinkedwiththechangeofemotions2.Theunderlinedword“synchronise”inParagraph4means“”.A.moveslowlyB.changerapidlyC.relaxtemporarilyD.respondaccordingly3.F