考研英语试题是怎样炼成的 2015年全国硕士研究生入学统一考试英语（一）试题Section I Use of EnglishDirections:Read the following text. Choose the best word(s) for each numbered blank and mark A, B, C or D on ANSWER SHEET. (10 points)Though not biologically related, friends are as “related” as fourth cousins, sharing about 1% of genes. That is _(1)_a study, published from the University of California and Yale University in the Proceedings of the National Academy of Sciences, has__(2)_.The study is a genome-wide analysis concted _(3)__1,932 unique subjects which __(4)__pairs of unrelated friends and unrelated strangers. The same people were used in both_(5)_.While 1% may seem_(6)_,it is not so to a geneticist. As James Fowler, professor of medical genetics at UC San Diego, says, “Most people do not even _(7)_their fourth cousins but somehow manage to select as friends the people who_(8)_our kin.”The study_(9)_found that the genes for smell were something shared in friends but not genes for immunity .Why this similarity exists in smell genes is difficult to explain, for now,_(10)_,as the team suggests, it draws us to similar environments but there is more_(11)_it. There could be many mechanisms working together that _(12)_us in choosing genetically similar friends_(13)_”functional Kinship” of being friends with_(14)_!One of the remarkable findings of the study was the similar genes seem to be evolution_(15)_than other genes Studying this could help_(16)_why human evolution picked pace in the last 30,000 years, with social environment being a major_(17)_factor.The findings do not simply explain people’s_(18)_to befriend those of similar_(19)_backgrounds, say the researchers. Though all the subjects were drawn from a population of European extraction, care was taken to_(20)_that all subjects, friends and strangers, were taken from the same population.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 [A] defended[B] concluded[C] withdrawn[D] advised3.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] sought[C] separated[D] connected5. [A] tests[B] objects[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] according to[B] rather than[C] regardless of[D] along with14. [A] chances[B]responses[C]missions[D]benefits15. [A] later[B]slower[C] faster[D] earlier16. [A]forecast[B]remember[C]understand[D]express17. [A] unpredictable[B]contributory[C] controllable[D] disruptive18. [A] endeavor[B]decision[C]arrangement[D] tendency19. [A] political[B] religious[C] ethnic[D] economic20. [A] see[B] show[C] prove[D] tell