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This is one of the most diligent students that I（）.

By the end of this week, we workers surely（）a satisfactory solution to the technological problem.

Many a boy and many a girl（）it with（）own eyes.

Neither of the young men who had applied for a position in the university（）.

When enough of the tree （）chopped away, the tree falls.

Look at the terrible situation I am in! If only I（）your advice.

I meant （）the matter with you, but I had some guests then.

Hydrogen is the fundamental element of the universe（）it provides the building blocks from which the other elements are produced.

I was advised to arrange for insurance（）I needed medical treatment.

A suitcase with shirt, trousers and shoes （）stolen from the car.

I support your decision, but I should also make it clear that I am not going to be（）to it.

AIDS was an（）disease in the 1980s. Now as new medicines are developed, it has become treatable.

A(n)（）reading approach to reading is a combination of approaches (global, analytic and synthetic) used to suit the convenience of the reader.

（）with languages gives you an edge in many jobs and professional opportunities, but is especially valuable in fields such as advertising, anthropology, business, education and foreign affairs.

Diets may have（）effect in children: boys and girls who diet to lose or maintain weight may actually be doing the opposite.

It can’t hurt to look at the “good job” lists to see if any of the careers on it appeal to you, but you shouldn’t use the list to（）your choice.

He doesn’t seem to be able to（）any interest in his studies.

Astronaut Jim Voss has enjoyed many memorable moments in his career, including three space flights and one space walk. But he recalls with special fondness a decidedly earthbound （为地球引力所束缚的）experience in the summer of 1980, when he participated in the NASA-ASEE Summer Faculty Fellowship Program. Voss, then a science teacher at West Point, was assigned to the Marshall Space Flight Center’s propulsion （推进）lab in Alabama to analyze why a hydraulic fuel pump seal on the space shuttle was working so well when previous seats had failed. It was a seemingly tiny problem among the vast complexities of running the space program. Yet it was important to NASA because any crack in the seals could have led to destructive results for the astronauts who relied on them.“I worked a bit with NASA engineers，” says Voss, “but I did it mostly by analysis. I used a handheld calculator, not a computer, to do a thermodynamic （热力学的）analysis.” At the end of the summer, he, like the other NASA-ASEE fellows working at Marshall, summarized his findings in a formal presentation and detailed paper. It was a valuable moment for Voss because the ASEE program gave him added understanding of NASA, deepened his desire to fly in space, and intensified his application for astronaut status.It was not an easy process. Voss was actually passed over when he first applied for the astronaut program in 1978. Over the next nine years he reapplied repeatedly, and was finally accepted in 1987. Since then he has participated in three space missions. The 50 year-old Army Officer, who lives in Houston, is now in training for a four-month mission as a crew member on the International Space Station starting in July 2000.Voss says the ASEE program is wonderful for all involved. “It brings in people from the academic world and gives NASA a special property for a particular period of time. It brings some fresh eyes and fresh ideas to NASA, and establishes a link with our colleges and universities, Voss explains. “There is an exchange of information and an exchange of perspectives that is very important.” For the academic side, Voss says, the ASEE program also “brings institutions of higher learning more insight into new technology. We give them an opportunity to work on real world problems and take it back to the classroom.”1.Why was the hydraulic fuel pump seal important for the space shuttle?2.The great significance of Voss’s findings lies in（）.I. strengthening his determination to join in space flightsII. furthering his understanding of NASAIII. Consolidating his astronaut status in NASA programs3.How many flights will Voss have finished if his four-month mission starting in July 2000 ends up successfully?4.Which of the following is NOT TRUE according to what Voss said on the ASEE program?5.What does Voss want to stress in the last paragraph?

Nuclear power’s danger to health, safety, and even life itself can be summed up in one word: radiation.Nuclear radiation has a certain mystery about it, partly because it cannot be detected by human senses. It can't be seen or heard, or touched or tasted, even though it may be all around us. There are other things like that. For example, radio waves are all around us but we can’t detect them, sense them without a radio receiver. Similarly, we can’t sense radioactivity without a radiation detector. But unlike common radio waves, nuclear radiation is not harmless to human beings and other living things.At very high levels, radiation can kill an animal or human being outright by killing masses of cells in vital organs; but even the lowest levels can do serious damage. There is no level of radiation that is completely safe. If the radiation does not hit anything important, the damage may not be significant. This is the case when only a few cells are hit. And if they are killed outright, your body will replace the dead cells with healthy ones. But if the few cells are only damaged, and if they reproduce themselves, you may be in trouble. They reproduce themselves in a deformed way. They can grow into cancer. Sometimes this does not show up for many years.This is another reason for some of the mystery about nuclear radiation. Serious damage can be done without the victim being aware at the time that damage has occurred. A person can be irradiated and feel fine. Then die of cancer in five, ten, or twenty years later as a result. Or a child can be born weak or liable to serious illness as a result of radiation absorbed by its grandparents.Radiation can hurt us. We must know the truth.1.According to the passage, the danger of nuclear power lies in（）.2.Radiation can cause serious consequences even at the lowest level （）. 3.Radiation can hurt us in the way that it can （）. 4.Which of the following can be best inferred from the passage?

Specialization can be seen as a response to the problem of an increasing accumulation of scientific knowledge. By splitting up the subject matter into smaller units, one man could continue to handle the information and use it as the basis for further research. But specialization was only one of a series of related developments in science affecting the process of communication. Another was the growing professionalization of scientific activity.No clear-cut distinction can be drawn between professionals and amateurs in science: exceptions can be found to any rule. Nevertheless, the word “amateur” does carry a connotation that the person concerned is not fully integrated into the scientific community and, in particular, may not fully share its values. The growth of specialization in the nineteenth century, with its consequent requirement of a longer more complex training, implied greater problems for amateur participation in science. The trend was naturally most obvious in those areas of science based especially on a mathematical or laboratory training, and can be illustrated in terms of the development of geology in the United Kingdom.A comparison of British geological publications over the last century and a half reveals not simply an increasing emphasis on the primacy of research, but also a changing definition of what constitutes an acceptable research paper: Thus, in the nineteenth century, local geological studies represented worthwhile research in their own right; but, in the twentieth century, local studies have increasingly become acceptable to professionals only if they incorporate, and reflect on, the wider geological picture. Amateurs, on the other hand, have continued to pursue local studies in the old way. The overall result has been to make entrance to professional geological journals harder for amateurs, a result that has been reinforced by the widespread introduction of refereeing, first by national journals in the nineteenth century and then by several local geological journals in the twentieth century. As a logical consequence of this development, separate journals have now appeared aimed mainly towards either professional or amateur readership. A rather similar process of differentiation has led to professional geologists coming together nationally within one or two specific societies, whereas the amateurs have tended either to remain in local societies or to come together nationally in a different way.Although the process of professionalization and specialization was already well under way in British geology during the nineteenth century, its full consequences were thus delayed until the twentieth century. In science generally, however the nineteenth century must be reckoned as the crucial period for this change in the structure of science.1.The growth of specialization in the 19th century might be more clearly seen in sciences such as（）.2.We can infer from the passage that （）. 3.The author writes of the development of geology to demonstrate （）. 4.The direct reason for specialization is（）.

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