考研英语真题英语一真题
完整 版 Directions : Read the following text . Choose the best word ( s ) for each numbered blank and mark A , B , Cor 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 conducted _ ( 3 ) _ 1 , 932 unique subjects which ( 4 ) p airs 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 manymechanisms working together that _ ( 12 ) _ us in choosing genetically similar friends _ ( 13 ) _ " functional Kinship " of being friends Oneof 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 exp lain 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 [ A ] defended [ B ] concluded [ C ] withdrawn [ D ] advised 3 .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 ] sough [ Clseparaed [ D ] comnected 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 ] again [ B ] also [ C ] instead [ D ] thus 10