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　　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)_____1932 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 co-author of the study 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 team also developed a "friendship score" which can predict who will be your friend based on their genes.

　　The study(9)_____found that the genes for smell were something shared in friends but not genes for immunity. Why this similarity in olfactory 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 in tandem that(12)_____ us in choosing genetically similar friends (13)_____than "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 corroborate 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. The team also controlled the data to check ancestry of subjects.

　　1、_____

　　A.what

　　B.why

　　C.how

　　D.when

　　正确答案是：A

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　　2、_____

　　A.defended

　　B.concluded

　　C.withdrawn

　　D.advised

　　正确答案是：B

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　　3、_____

　　A.for

　　B.with

　　C.by

　　D.on

　　正确答案是：D

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　　4、_____

　　A.separated

　　B.sought

　　C.compared

　　D.connected

　　正确答案是：C

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　　5、_____

　　A.tests

　　B.objects

　　C.samples

　　D.examples

　　正确答案是：C

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　　6、_____

　　A.insignificant

　　B.unexpected

　　C.unreliable

　　D.incredible

　　正确答案是：A

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　　7、_____

　　A.visit

　　B.miss

　　C.know

　　D.seek

　　正确答案是：C

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　　8、_____

　　A.surpass

　　B.influence

　　C.favor

　　D.resemble

　　正确答案是：D

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　　9、_____

　　A.again

　　B.also

　　C.instead

　　D.thus

　　正确答案是：B

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　　10、_____

　　A.Meanwhile

　　B.Furthermore

　　C.Likewise

　　D.Perhaps

　　正确答案是：D

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　　11、_____

　　A.about

　　B.to

　　C.from

　　D.like

　　正确答案是：B

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　　12、_____

　　A.limit

　　B.observe

　　C.confuse

　　D.drive

　　正确答案是：D

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　　13、_____

　　A.according to

　　B.rather than

　　C.regardless of

　　D.along with

　　正确答案是：B

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　　14、_____

　　A.chances

　　B.responses

　　C.benefits

　　D.missions

　　正确答案是：C

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　　15、_____

　　A.faster

　　B.slower

　　C.later

　　D.earlier

　　正确答案是：A

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　　16、_____

　　A.forecast

　　B.remember

　　C.express

　　D.understand

　　正确答案是：D

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　　17、_____

　　A.unpredictable

　　B.contributory

　　C.controllable

　　D.disruptive

　　正确答案是：B

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　　18、_____

　　A.tendency

　　B.decision

　　C.arrangement

　　D.endeavor

　　正确答案是：A

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　　19、_____

　　A.political

　　B.religious

　　C.ethnic

　　D.economic

　　正确答案是：C

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　　20、_____

　　A.see

　　B.show

　　C.prove

　　D.tell

　　正确答案是：A

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