2015考研英语真题完整版（英语一） (y2P."
Cloze C +-sf
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)_. ,u
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)_. bE" J &;|
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.” (FOJHjtkM
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)_! z_:r&UP`"
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. V`LW~P;
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. X+ //$J
1. [A] when [B] why [C] how [D] what 9~}8?kPNw=
2. [A] defended [B] concluded [C] withdrawn [D] advised %? z;'Y7D
3. [A] for [B] with [C] on [D] by o6S`7uwJ*/
4. [A] compared [B] sought [C] separated [D] connected cqb]LC
5. [A] tests [B] objects [C]samples [D] examples l4q7,%G
6. [A] insignificant [B] unexpected [C]unbelievable [D] incredible )h;zH,DA[3
7. [A] visit [B] miss [C] seek [D] know 6X$iTJ[\x
8. [A] resemble [B] influence [C] favor [D] surpass 15!b]':
9. [A] again [B] also [C] instead [D] thus 2Zw]Uu`sb
10. [A] Meanwhile [B] Furthermore [C] Likewise [D] Perhaps DZX4c 2J
11. [A] about [B] to [C]from [D]like f 2{qj5 K
12. [A] drive [B] observe [C] confuse [D]limit 20mZ{_%
13. [A] according to [B] rather than [C] regardless of [D] along with i<{/r-w=E
14. [A] chances [B]responses [C]missions [D]benefits bqUQadD B
15. [A] later [B]slower [C] faster [D] earlier _ 4+ =S)$
16. [A]forecast [B]remember [C]understand [D]express ,NQ>,}a0
17. [A] unpredictable [B]contributory [C] controllable [D] disruptive pPZ^T5-ks
18. [A] endeavor [B]decision [C]arrangement [D] tendency \
ffU1 5@N
19. [A] political [B] religious [C] ethnic [D] economic w 3peG^4D_
20. [A] see [B] show [C] prove [D] tell ^ px)W,O
