考研英语真题英语一真题.pdf

考研英语真题英语一真题完整版Directions:Readthefollowingtext.Choosethebestword(s)foreachnumberedblankandmarkA,B,CorDonANSWERSHEET.(10points)Thoughnotbiologicallyrelated,friendsareas“related"asfourthcousins,sharingabout1%ofgenes.Thatis_(1)_astudy,publishedfromtheUniversityofCaliforniaandYaleUniversityintheProceedingsoftheNationalAcademyofSciences,has(2)_.Thestudyisagenome-wideanalysisconducted_(3)__1,932uniquesubjectswhich(4)pairsofunrelatedfriendsandunrelatedstrangers.Thesamepeoplewereusedinboth_(5)_.While1%mayseem_(6)_,itisnotsotoageneticist.AsJamesFowler,professorofmedicalgeneticsatUCSanDiego,says,“Mostpeopledonoteven_(7)_theirfourthcousinsbutsomehowmanagetoselectasfriendsthepeoplewho_(8)_ourkin.Thestudy_(9)_foundthatthegenesforsmellweresomethingsharedinfriendsbutnotgenesforimmunity.Whythissimilarityexistsinsmellgenesisdifficulttoexplain,fornow,_(10)_,astheteamsuggests,itdrawsustosimilarenvironmentsbutthereismore_(11)_it.Therecouldbemanymechanismsworkingtogetherthat_(12)_usinchoosinggeneticallysimilarfriends_(13)_"functionalKinship"ofbeingfriendsOneoftheremarkablefindingsofthestudywasthesimilargenesseemtobeevolution_(15)_thanothergenesStudyingthiscouldhelp_(16)_whyhumanevolutionpickedpaceinthelast30,000years,withsocialenvironmentbeingamajor_(17)_factor.Thefindingsdonotsimplyexplainpeople's_(18)_tobefriendthoseofsimilar_(19)_backgrounds,saytheresearchers.ThoughallthesubjectsweredrawnfromapopulationofEuropeanextraction,carewastakento_(20)_thatallsubjects,friendsandstrangers,weretakenfromthesamepopulation.1.[A]when[B]why[C]how[D]what2.[A]defended[B]concluded[C]withdrawn[D]advised3.[A]for[B]with[C]on[D]by4.[A]compared[B]sough[Clseparaed[D]comnected5.[A]tests[B]s[C]samples[D]examples6.[A]insignificant[B]unexpected[C]unbelievable[D]incredible7.[A]visit[B]miss[C]seek[D]know8.[A]resemble[B]influence[C]favor[D]surpass9.[A]again[B]also[C]instead[D]thus10.[A]Meanwhile[B]Furthermore[C]Likewise[D]Perhaps11.[A]about[B]to[C]from[D]like12.[A]drive[B]observe[C]confuse[D]limit13.[A]accordingto[B]