大学英语六级（2013年12月考试改革适用）模拟试卷407
作文
1.For this part, you are allowed 30 minutes to write an essay that begins with the sentence \\
People are now increasingly aware of the danger of \\
解析：本题要求考生以“现今人们越发意识到’外貌焦虑’或沉迷于自身外貌的危害”作为开头句写一篇文章。文章可以支持这个观点并给出理由，可采用以下结构：
第一段：以题目给出的句子开头并给出自己的观点。
第二段：说明意识到外貌焦虑的危害可促进身心健康。
第三段：说明减少外貌焦虑有利于发挥个人潜能。
第四段：总结文章。
词汇理解
Unthinkable as it may be, humanity, every last person, could someday be wiped from the face of the Earth. We have learned to worry about asteroids (小行星) and super volcanoes, but the more likely【C1】________, according to Nick Bostrom, a professor of philosophy at Oxford, is that we humans will destroy ourselves.
Professor Bostrom, who directs Oxford\’s Future of Humanity Institute, has argued over the course of several papers that human【C2】________risks are poorly understood and, worse still, 【C3】________underestimated by society. Some of these existential risks are fairly well known, especially the natural ones. But others are【C4】________or even exotic. Most worrying to Bostrom is the subset of existential risks that【C5】________from human technology, a subset that he expects to grow in number and potency over the next century.
Despite his concerns about the risks【C6】________to humans by technological progress, Bostrom is no luddite (科技进步反对者). In fact, he is a longtime【C7】________of transhumanism—the effort to improve the human condition, and even human nature itself, through technological means. In the long run he sees technology as a bridge, a bridge we humans must cross with great care, in order to reach new and better modes of being. In his work, Bostrom uses the tools of philosophy and mathematics, in
【C8】________probability theory, to try and determine how we as a【C9】________might achieve this safe passage. What follows is my conversation with Bostrom about some of the most interesting and worrying existential risks that humanity might【C10】________in the decades and centuries to come, and about what we can do to make sure we outlast them.
A) advocate E) essential I) particular M) shrewdly
B) arise F) evaporation J) posed N) species
C) emphasized G) extinction K) scenario O) variety
D) encounter H) obscure L) severely
2.【C1】
K
解析：scenario。注意空格后的according to Nick Bostrom…Oxford是插入语，本句的主干是the more likely________ is that…，故空格处应填入名词作主语，前后句提到的是人类可能遭遇灭绝的情况，填入scenario，表示“可能发生的事，可能出现的情况”，符合语境。
3.【C2】
G
解析：extinction。空格在短语human________risks中，在句子中作主语。下一句的these existential risks“这些生存威胁”指代的就是本句的human________risks，故语义应该近似，填入extinction，表示“人类灭绝的危机”，与下一句的“生存威胁”正好对应。
4.【C3】
L
解析：severely。由空格前的and可知，空格处的________underestimated与前面的poorly understood并列，故空格处应填入副词，修饰underestimated，填入severely表示“严重低估”，与前面的“了解得很少”形成递进并列，故为答案。词库中的另一副词shrewdly表示“精明地，敏锐地”为褒义词，与本句的感情色彩不符。
5.【C4】
H
解析：obscure。空格应填入形容词与后面的（even）exotic“（甚至是）奇特的”形成递进并列，obscure表示“少人知道的”，与exotic正好对应，也能与上一句fairly well known“相当出名”构成转折关系（前后句由But连接）。
6.【C5】
B
解析：arise。空格处于定语从句that________from human technology中，该从句修饰the subset of existential risks。该从句缺谓语，空格处应填入动词，且能与from构成搭配。短语arise from表示“由……产生”，填入后指由人类科技产生的生存威胁。
7.【C6】
J
解析：posed。空格位于名词短语his concerns
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