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1、2015年全国硕士研究生入学统一考试英语（一）试题考试时长：180分钟总分：100分SectionIUseofEnglish:Directions:Readthefollowingtext.Choosethebestword(s)foreachnumberedblankandmarkA,B,CorDontheANSWERSHEET.(10points)Thoughnotbiologicallyrelated,friendsareas“related”asfourthcousins,sharingabout1%ofgenes.Thatis_(1)_astudy,publishedf
2、romtheUniversityofCaliforniaandYaleUniversityintheProceedingsoftheNationalAcademyofSciences,has__(2)_. Thestudyisagenome-wideanalysisconducted_(3)__1,932uniquesubjectswhich__(4)__pairsofunrelatedfriendsandunrelatedstrangers.Thesamepeoplewereusedinboth_(5)_. While1%mayseem_(6)_,itisnotsotoag
3、eneticist.AsJamesFowler,professorofmedicalgeneticsatUCSanDiego,says,“Mostpeopledonoteven_(7)_theirfourthcousinsbutsomehowmanagetoselectasfriendsthepeoplewho_(8)_ourkin.” Thestudy_(9)_foundthatthegenesforsmellweresomethingsharedinfriendsbutnotgenesforimmunity.Whythissimilarityexistsinsmellgen
4、esisdifficulttoexplain,fornow,_(10)_,astheteamsuggests,itdrawsustosimilarenvironmentsbutthereismore_(11)_it.Therecouldbemanymechanismsworkingtogetherthat_(12)_usinchoosinggeneticallysimilarfriends_(13)_”functionalKinship”ofbeingfriendswith_(14)_! Oneoftheremarkablefindingsofthestudywasthesim
5、ilargenesseemtobeevolution_(15)_thanothergenesStudyingthiscouldhelp_(16)_whyhumanevolutionpickedpaceinthelast30,000years,withsocialenvironmentbeingamajor_(17)_factor. Thefindingsdonotsimplyexplainpeople’s_(18)_tobefriendthoseofsimilar_(19)_backgrounds,saytheresearchers.Thoughallthesubjectswe
6、redrawnfromapopulationofEuropeanextraction,carewastakento_(20)_thatallsubjects,friendsandstrangers,weretakenfromthesamepopulation. 1.[A]when[B]why[C]how[D]what 2.[A]defended[B]concluded[C]withdrawn[D]advised 3.[A]for[B]with[C]on[D]by 4.[A]compared[B]sought[C]separated[D]connected 5.[A]te
7、sts[B]objects[C]samples[D]examples 6.[A]insignificant[B]unexpected[C]unbelievable[D]incredible 7.[A]visit[B]miss[C]seek[D]know 8.[A]resemble[B]influence[C]favor[D]surpass 9.[A]again[B]also[C]instead[D]thus 10.[A]Meanwhile[B]Furthermore[C
