2015考研英语一完型填空真题（文字版）

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　　Directions:

　　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 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 8 our kin.

　　The study 9 found that the genes for small 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 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 peoples 18 to be friend those of similar 19 backgrounds, say the researchers. Though all the subjects were drawn from a population of European extraction, care taken to 20 that all subjects, friends and strangers, were taken from the same population.

　　1、 [A]what [B]why [C]how [D]when

　　2、 [A]defended [B]concluded [C]withdrawn [D] advised

　　3、 [A]for [B]with [C]by [D]on

　　4、 [A]separated [B]sought [C]compared [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] know [D] seek

　　8、 [A]surpass [B] influence [C] favor [D]resemble

　　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] limit [ B] observe [C] confuse [D]drive

　　13、[A] according to [ B] rather than [C] regardless of [D]along with

　　14、[A]chances [ B]responses [C]benefits [D]missions

　　15、[A] faster [ B]slower [C] later [D]earlier

　　16、[A] forecast [ B] remember [C] express [D]disruptive

　　17、[A] unpredictable [ B] contributory [C] controllable [D]disruptive

　　18、[A] tendency [ B] decision [C]arrangement [D]endeavor

　　19、[A] political [ B]religious [C] ethnic [D]economic

　　20、[A] see [ B]show [C] prove [D]tell

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