2015考研英语真题



　　section i use of english



　　directions:



　　read the following text. choose the best word(s) for each numbered blank and mark a, b, c or d on the 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 conducted _(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 that the similar genes seem to be evolving_(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] 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 [a] defended [b] concluded [c] withdrawn [d] advised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] tests [b] objects [c]samples [d] examples



　　6. [a] insignificant [b] unexpected [c]unreliable [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] likewise [d] perhaps



　　11. [a] about [b] to [c]from [d]like



　　12. [a] drive [b] observe [c] confuse [d]limit



　　13. [a] according to [b] rather than [c] regardless of [d] along with



　　14. [a] chances [b]responses [c]missions [d]benefits



　　15. [a] later [b]slower [c] faster [d] earlier



　　16. [a]forecast [b]remember [c]understand [d]express



　　17. [a] unpredictable [b]contributory [c] controllable [d] disruptive



　　18. [a] endeavor [b]decision [c]arrangement [d] tendency



　　19. [a] political [b] religious [c] ethnic [d] economic



　　20. [a] see [b] show [c] prove [d] tell



试题无缺版请下载:2015年考研英语一真题及答案（word版）



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