正确答案: A

the careers unattractive to U. S. students may not be so to foreign students

题目：According to this text__________.

解析：【答案】A【解析】在文章第二段中，“For the best and brightest from low-income countries，a position as a research assistant in the United States is attractive，whereas the best and brightest U．S．students might nOW see better options in other fields”可看出，A项与其意思相符，美国和其他国家的学生兴趣不同，而并不是美国学生没有勇气和没准备好去面对竞争，可排除c，D选项，而8项过于绝对。

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学习资料的答案和解析：

[单选题]The legislative provision has a great impact on the operations of the department.

clause

解析：【答案】D【解析】provision“规定”。law“法律”；passage“通过”；revision“修正”；clause“条款”。

[单选题]I tried very hard to persuade him to join our groups but I met with flat refusal.

refusal

解析：【答案】C【解析】本题意为“我竭力劝他加入我们的团体，但遭到断然拒绝”refusal“拒绝”：disapproval“不同意，不赞成”；rejection“拒绝，抵制”；decline“婉言谢绝”。flat refusal系固定搭配．意为“断然拒绝”。

[单选题]

回答下面的题目：Do you ever wish you were moreoptimistic，someone who always(51) __________ to be successful?Having someone around whoalways(52) __________the worst isn’t really a lot of(53) __________．We all know someone who sees a single cloud on asunny day and says，“It looks(54)rain．”But if you catch yourself thinkingsuch things，it’s important to dosomething(5 5) __________it．You can change your view of life，(56) __________to psychologists．It only takes a little effort，and you’llfind life more rewarding as a(57) __________．Optimism，they say，is partly about self—respectedconfidence but it’s also a more positive way of looking at life and all it hasto(58) __________．Optimists are more(59) __________tostart new projects and are generally more prepared to take risks．Upbringing is obviously veryimportant in forming your(60) __________to the world．Some people are brought up to(61) __________toomuch on others and grow up forever blaming other people when anything(62) __________wrong．Most optimists，on the(63) __________hand，have been brought up not to(64) __________failure as the end of theworld-they just(65) __________with their lives．

get on

解析：A项get up意为“起床”；B项get on意为“上车，向前进”；C项get out意为“离去，出去”；D项get over意为“克服”。本句的意思是那些在不把失败看作世界末日环境中成长起来的人在事情出错时只是继续过自己的日子。所以选B。

[单选题]In the eyes of the author, what happens to a scholar who shares his ideas with his colleagues?

根据以下材料回答下面的题目：Academic MobilityScholars and students have always been great travelers. "Academic mobility" is now often stated as a fundamental necessity for economic and social progress in the world, but it is certainly nothing new. Serious students were always ready to go abroad in search of the most stimulating teachers and the most famous academies; in search of the purest philosophy, the most effective medicine, the likeliest road to gold.Mobility of this kind means also mobility of ideas, their transference across frontiers, their simultaneous impact upon many groups of people. The point of learning is to share it, whether with students or with colleagues; one presumes that only eccentrics have an interest in being credited with a startling discovery, or a new technique. It must also have been reassured to know that other people in other parts of the world were about to make the same discovery or were thinking along the same lines, and that one was not quite alone, confronted by inquisition, ridicule or neglect.In the twentieth century, and particularly in the last twenty years, the old footpaths of the wandering scholars have become vast highways. The vehicle which has made this possible has of course been the aero plane, making contact between scholars even in most distant places immediately feasible, and providing for the very rapid transmission of knowledge. Apart from the vehicle itself, it is fairly easy to identify the main factors which have brought about the recent explosion in academic movement. Some of these are purely quantitative and require no further mention: there are far more centers of leaming, and a far greater number of scholars and students.In addition, one must recognize the very considerable multiplication of disciplines, particularly in the sciences, which by widening the total area of advanced studies has produced an enormous number of specialists whose particular interests ale precisely defined. These people would work in some isolation if they were not able to keep in touch with similar isolated groups in other countries.It can be concluded from the passage that "academic mobility"__________

He gains recognition for his achievement

解析：【解析】观点推断题，文中第二段提到“The point of learning is to share it，whether with students or with colleagues”，本段最后一句提到“one was not quite alone”，当一位学者与其同事分享观点想法时，从而会得到其他人对他的成就的认可。而A选项文中完全未曾涉及过。C、D选项均为与其相反的对比结果，故均可排除。

[单选题]The country was torn apart by strife.

war

解析：【解析】句意：这个国家被内部纷争搞得四分五裂。这里strife的意思是冲突。四个选项poverty“贫困”；conflict“冲突”；war“战争”；economy“经济”。

[单选题]These programs are of immense value to old people.

enormous

解析：【题干】这个项目对老年人们有巨大的价值。 【解析】考查形容词。题干划线词immense意为“巨大的”，所以正确答案为D。

[单选题]Sulfur has occasionally been found in the earth in an almost pure state.

sometimes