Part Ⅲ VocabularyDirections: In this part, there are 20 sentences with four choices below each sentence. Choose the best one from the 4 choices. Then mark the corresponding letter on the ANSWER SHEET with a single line through the center. Part Ⅴ TranslationDirections: Read the following passage carefully and then translate it into Chinese. Write your translation on the ANSWER SHEET(2).1. Two teams of astronomers using the Hubble Space Telescope have overturned several decades of conjecture and theory by ruling out the possibility that small, dim stars make up most of the mass in the universe.
Until now, small stars known as faint red dwarfs were considered ideal candidates for the so-called "dark matter" that is believed to account for more than 90 percent of the mass of the universe.
All visible celestial objects, such as planets, stars and galaxies, are believed to account for only 10 percent of the mass of the universe. The rest of the "missing mass" is presumably invisible because it does not emit or reflect light, or the light is too feeble to be detected. But dark matter can be indirectly detected due to its gravitational influence on other visible objects.
According to Bacall, professor of natural science at the Institute of Advanced Study in Princeton, New Jersey and leader of one of the teams, the nature of dark matter, and its abundance, are among the most important questions in modem cosmology today.
The ultimate fate of the universe will be determined by the amount of dark matter present. If there is not enough dark matter to bind the universe together gravitationally, it could continue expanding forever. If there is enough mass to hold the universe together gravitationally, the universe may slow down its expansion, come to a halt and begin to contract and eventually collapse.
[参考译文]
两个天文学家小组用哈勃太空望远镜排除了宇宙暗弱的小行星构成宇宙主要质量的可 能性，推翻了几十年来的推测和理论。
到现在为止，被称为淡红矮星的小星体一直被认为是所谓的“暗物质”的理想物质。天 文学家认为整个宇宙的90%以上都是由这种暗物质构成的。
天文学家认为，诸如行星、恒星和银河之类的所有可见天体只构成了宇宙质量的10%2~ 右。其他的“隐匿质量’’是不可见的，因为它们既不自己发光，也不反射光，抑或是发出的 光太微弱，以至于无法被探测到。但是由于暗物质对其他可见天体有引力作用，因此可以间 接被检测到。
巴考尔是新泽西州普林斯顿高级研究所的自然科学教授，也是两组天文学家中其中一组 的带头人。按照巴考尔的说法，关于暗物质的本质和存在丰富性的讨论，是当代天文学上的 重要课题之一。
宇宙的最终命运将由存在的暗物质的量来决定。如果没有足够的暗物质通过引力作用将 宇宙黏合在一起的话，宇宙将会永远不停地膨胀。然而，如果能有足够的质量通过引力作用 把宇宙拉合在一起的话，宇宙就有可能减速并停止膨胀，继而开始收缩，并最终坍缩。
Part Ⅵ Writing1. Directions: Write a composition of no less than 200 words on the following topic on the Answer Sheet(2): Opportunity and Success.
[参考范文]
Opportunity and Success
There are growing concerning among numerous philosophers，writers，and professors about the Issue of opportunity and success．
Generally speaking，success depends on many things，including academic intelligence，family background and objective situations．But opportunity plays a key role in success．The invention of PC computer gave Bill Gates an opportunity to success；economic globalization is an opportunity for China to access WTO．
However,opportunity alone not necessarily leads to success．Only when the goal is realistic could opportunities be available for success．In addition，man should find opportunity and seize it， then take it correctly．For example，now as a graduate student，I have an opportunity to receive higher education which can expand my horizon of knowledge．If I take it，I would become a successful doctor with hard work．
In conclusion，we all thirst for success，big or small．No opportunity,no success．Just as the saying goes：where there is a will，there is a way．I firmly believe that everything is possible with diligence and well．preparation．
深色：已答题 浅色：未答题