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 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 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 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 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 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] 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 [A] defended [B] concluded [C] withdrawn [D] advised 3.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
