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 l% 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 l% 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] 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2.[A] defended  [B] concluded  [C] withdrawn  [D] advised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] understand  [D] express

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