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2、Directions: Readthefollowingtext.Choosethebestword(s)foreachnumberedblankandmarkA,B,CorDonANSWERSHEET.(10points) Thoughnotbiologicallyrelated,friendsareas“related”asfourthcousins,sharingabout1%ofgenes.Thatis_(1)_astudy,publishedfromtheUniversityofCaliforniaandYaleU
3、niversityintheProceedingsoftheNationalAcademyofSciences,has__(2)_. Thestudyisagenome-wideanalysisconducted_(3)__1,932uniquesubjectswhich__(4)__pairsofunrelatedfriendsandunrelatedstrangers.Thesamepeoplewereusedinboth_(5)_. While1%mayseem_(6)_,itisnotsotoageneticist.A
4、sJamesFowler,professorofmedicalgeneticsatUCSanDiego,says,“Mostpeopledonoteven_(7)_theirfourthcousinsbutsomehowmanagetoselectasfriendsthepeoplewho_(8)_ourkin.” Thestudy_(9)_foundthatthegenesforsmellweresomethingsharedinfriendsbutnotgenesforimmunity.Whythissimilarityex
5、istsinsmellgenesisdifficulttoexplain,fornow,_(10)_,astheteamsuggests,itdrawsustosimilarenvironmentsbutthereismore_(11)_it.Therecouldbemanymechanismsworkingtogetherthat_(12)_usinchoosinggeneticallysimilarfriends_(13)_”functionalKinship”ofbeingfriendswith_(14)_! Oneoft
6、heremarkablefindingsofthestudywasthesimilargenesseemtobeevolution_(15)_thanothergenesStudyingthiscouldhelp_(16)_whyhumanevolutionpickedpaceinthelast30,000years,withsocialenvironmentbeingamajor_(17)_factor. Thefindingsdonotsimplyexplainpeople’s_(18)_tobefriendthoseofs
7、imilar_(19)_backgrounds,saytheresearchers.ThoughallthesubjectsweredrawnfromapopulationofEuropeanextraction,carewastakento_(20)_thatallsubjects,friendsandstrangers,weretakenfromthesamepopulation. 1.[A]when[B]why[C]how[D]what 2.[A]defended[B]concluded[C]withdrawn[D]ad
8、vised 3.[A]for[B]with[C]on[D]by 4.[A]compared[B]sought[C]separated[D]connected
9、 5.[A]tests[B]s[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]agai
10、n[B]also[C]instead[D]thus 10.[A]Meanwhile[B]Furthermore[C]Likewise[D]Perhaps 11.[A]about[B]to[C]from[D]like 12.[A]drive[B
