To repair or improve the appearance of something is to fix it . A. out B. off C. up D. over 题目和参考答案——青夏教育精英家教网—

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To repair or improve the appearance of something is to fix it ______.

A. out B. off C. up D. over

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As we all know sewing-machine(缝纫机) repair is one of the fastest growing businesses in the world today. Newspapers, women’s magazines, high schools and colleges are all encouraging millions of American women to do their own sewing, not only to make their own shirts and sweaters, but also to make nice clothes for their husbands, sons, or boyfriends. The lattes figures(数字) show that over 89 million American women, because of the high costs of ready-to-wear clothing are now making almost all of their families’ clothes. Most of these women get great satisfaction from making the family clothes on their own sewing machines. So it is natural that the demand(要求) for excellent service of sewing machines is growing.

Think of it! 89 million or more sewing machines, not including another 10 million sewing machines in schools of all kinds, need service at least once a year, and quite possibly four or more times each year. I know some women who return their sewing machines to repairmen time after time to get them fixed properly. I’ve seen sewing machines come out of repair shops in worse condition than they were when they went in.

So I’ve decided to write an introduction book to sewing-machine repair and teach people how to repair their own sewing machines at home. It’s not that difficult. In the book, I will teach you everything you need to know about how to repair your sewing machine.

The author wrote the passage to .

A. teach women to repair their sewing machines.

B. explain his or her purpose in writing the book

C. introduce the reasons for doing one’s own sewing

D. tell us that sewing-machine repair is a fast-growing business

American women make clothes by themselves because .

A. they cannot buy the clothes they see in magazines

B. their husbands or boyfriends want them to do so

C. ready-to-wear clothes cost a great deal of money

D. they can’t get great satisfaction from buying clothes

We learn from the passage that sewing machines .

A. aren’t very difficult to be repaired

B. cannot work well after one year

C. don’t easily get broken

D. need service 4 times a month

It can be inferred from the passage that .

A. the book will also show you how to make nice clothes

B. there are not enough sewing-machine-repair shops in America

C. over 99 million sewing machines need service at least once a year

D. the demand for excellent service of sewing machines grows the fastest in America

What you asked me to repair is ____my power；besides, the car is ____ repair, so you’d better buy a new one.

A．out of, under	B．within, beyond
C．beyond, within	D．beyond, out of

Broken rubber bands and flat tires requiring replacement could soon be a thing of the past．
French researchers have developed a new kind of rubber that can repair itself when broken．The new rubber is made from widely available materials including vegetable oil and a common industrial chemical．All the materials are considered safe to the environment and can be easily reused．
The best part is that the new rubber can be repaired and used again and again without losing its strength or ability or stretch．When cut, the rubber can be made new again, simply by pressing the two broken ends back together．
The product can be repaired at room temperature, around twenty degrees Centigrade；other self-healing materials require higher temperatures for repair．
Traditionally, rubber substances are made from huge molecules（分子）connected by strong chemical links, or bonds．The new rubber is made of smaller molecules．The molecules are linked together using hydrogen bonds．When connected in this way, the molecules act like one long molecule, forming what is called supramolecular networks（超分子网）．When the rubber is cut, the molecules attempt to connect with whatever molecule is near them．When pressed together, the molecules are able to repair themselves at the molecular level, making the repaired rubber like new．
However, time is an important element in the process．If the broken ends are not brought together quickly, a repair is not possible．This is because molecules will form bonds with molecules on their own side．The inventors say the surfaces of the rubber can be repaired within a week of being separated．
The rubber is the creation of scientists at the Industrial Physics and Chemistry Higher Education Institution in Paris．The organization is part of France’s National Center for Scientific Research．The new material is described in greater detail in the research publication Nature．
【小题1】According to the introduction, which of the following is NOT the advantage of the new rubber?

A．It can be made as easily as common rubber．

B．It is environmentally-friendly．

C．It can repair itself at room temperature．

D．It is made of smaller molecules．

【小题2】What does the 5th paragraph mainly tell us?

A．Why the new rubber is unique．

B．Why the new rubber can repair itself．

C．The new rubber is made from huge molecules．

D．The new rubber is different from the common rubber．

【小题3】If we want to know more about the technology of this kind of new rubber, where can we get the information?

A．In the researchers’ diary．

B．In a guide book．

C．In a research magazine．

D．In a newspaper．

As result of the serious flood , the majority of the buildings in this area ______.

A. need repairing B. needs to be repaired

C. needs repairing D. need to repair

What will people die of 100 years from now? If you think that is a simple question, you have not been paying attention to the revolution that is taking place in bio-technology(生物技术). With the help of new medicine, the human body will last a very long time. Death will come mainly from accidents, murder and war. Today's leading killers, such as heart diseases, cancer, and aging itself, will become distant memory.

In discussion of technological changes, the Internet gets most of the attention these days. But the change in medicine can be the real technological event of our times. How long can humans live? Human brains were known to decide the final death. Cells(细胞) are the basic units of all living things, and until recently, scientists were sure that the life of cells could not go much beyond 120 years because the basic materials of cells, such as those of brain cells, would not last forever. But the upper limits will be broken by new medicine. Sometime between 2050 and 2100, medicine will have advanced to the point at which every 10 years or so, people will be able to take medicine to repair their organs(器官). The medicine, made up of the basic building materials of life, will build new brain cells, heart cells, and so on---in much the same way our bodies make new skin cells to take the place of old ones.

It is exciting to imagine that the advance in technology may be changing the most basic conditional human existence, but many technical problems still must be cleared up on the way to this wonderful future.

1.According to the passage, human death is now mainly caused by _______.

A．diseases and aging	B．accidents and war
C．accidents and aging	D．heart diseases and war

2.In the author's opinion, today's most important advance in technology lies in _____.

A．medicine

B．the internet

C．brain cells

D．human organs

3. Humans may live longer in the future because ______.

A．heart disease will be far away from us

B．human brains can decide the final death

C．the basic materials of cells will last forever

D．human organs can be repaired by new medicine

4. We can learn from the passage that _____.

A．human life will not last more than 120 years in the future

B．human have to take medicine to build new skin cells now

C．much needs to be done before humans can have a longer life

D．we have already solved the technical problems in building new cells.

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