British and American scientists are raising genetically modified(转基因的) pigs in the hope of providing organs for transplant(移植) to humans, the project leader wrote in a newspaper Sunday.
Scientists in London and California have begun conducting the genetic experiments to find a solution to record–long waiting lists for organ transplants, Robert Winston said in an opinion piece written for Britain's Sunday Times.
In Britain alone, around 8,000 patients are waiting for a transplant.
"People needing a new heart or liver are waiting for someone else to die – usually a violent death in a traffic accident," Winston wrote in the newspaper. He said his team was "trying to modify pigs so their organs might save the lives of humans."
The scientists are introducing human genes into the animals to reduce the chances of the organs being rejected by patients, as has been common in previous attempts to use animal tissues, said Winston, who heads the Institute of Reproductive and Developmental Biology at London's Hammersmith Hospital.
Working with Dr. Carol Redhead of the California Institute of Technology, Winston's team has injected human genes directly into male piglets(猪仔), adding them to the animal's sperm(精子).
He said that pigs involved in experiments had successfully produced transgenic sperm, but acknowledged that British and European laws had prevented the team from using the pigs to mate.
The Sunday Times newspaper reported that the experiments would be moved to the United States following difficulties with funding and regulations in Britain. It said the pigs would be bred in Missouri.
"Our U.S. friends will benefit from our technology and the income we might have produced for Britain will be lost," Winston wrote.
Some scientists have previously blamed the idea of using animal organs for human transplant, saying the technique risks spreading animal viruses to humans. Winston said his research project is attempting to breed virus-free pigs.
49. Scientists are introducing human genes into the animals to ____________.
| A. make the organs healthier |
B. reduce the pain of animals |
| C. make the organs live longer |
D. reduce the chances of rejection |
50. Some scientists have blamed the idea of using animal organs for human transplant because ____________.
| A. the technique is not perfect now |
| B. humans may be infected with animal viruses |
| C. it is against laws and regulations |
| D. it may cause a conflict between humans and animals |
51. According to Winston, it seems ___________ to Britain to move the experiments to the United States.
| A. a pity |
B. a pride |
C. a disaster |
D. a good idea |
52. It can be inferred from the passage that ____________.
| A. animal organs are commonly used for human transplant now |
| B. lots of patients need animal organ transplants now |
| C. examples of the animal tissues being rejected have happened |
| D. it is not safe to use animal organs for human transplant |
The Great Fire of London started in the very early hours of 2 September 1666. In four days it destroyed more than three-quarters of the old city, where most of the houses were wooden and close together. One hundred thousand people became homeless, but only a few lost their lives.
The fire started on Sunday morning in the house of the King's baker(面包师) in Pudding Lane. The baker, with his wife and family, was able to get out through a window in the roof. A strong wind blew the fire from the bakery (面包房) into a small hotel next door. Then it spread quickly into Thames Street. That was the beginning.
By eight o'clock three hundred houses were on fire. On Monday nearly a kilometer of the city was burning along the River Thames. Tuesday was the worst day. The fire destroyed many well-known buildings, old St Paul's and the Guildhall along them.
Samuel Peyps, the famous writer, wrote about the fire. People threw their things into the river. Many poor people stayed in their houses until the last moment. Birds fell out of the air because of the heat.
The fire stopped only when the King finally ordered people to destroy hundreds of buildings in the path of the fire. With nothing left to burn, the fire became weak and finally died out.
After the fire, Christopher Wren, the architect (建筑师), wanted a city with wider streets and fine new houses of stone, In fact, the streets are still narrow, but he did build more than fifty churches, among them the new St Paul's.
The fire caused great pain and loss, but after it London was a better place: a city for the future and not just of the past.It seems that the writer of the text was most sorry for the fact that______.
| A．some people lost their lives |
| B．the birds in the sky were killed by the fire |
| C．many famous buildings were destroyed |
| D．the King's bakery was burned down |
Why did the writer cite (引用) Samuel Pepys?
| A．Because Pepys was among those putting out the fire. |
| B．Because Pepys also wrote about the fire. |
| C．To show that poor people suffered most. |
| D．To give the reader a clearer picture of the fire. |
How was the fire put out according to the text?
| A．The King and his soldiers came to help. |
| B．All the wooden houses in the city were destroyed. |
| C．People managed to get enough water from the river. |
| D．Houses standing in the direction of the fire were pulled down. |
Which of the following were reasons for the rapid spread of the big fire?______.
(a) There was a strong wind. (b) The streets were very narrow.
(c) Many houses were made of wood. (d) There was not enough water in the city.
(e) people did not discover the fire earlier.
A. (a), (b) B. (a), (b), (C) C. (a), (b), (d) D. (b), (c) (e)
Volunteers, as an essential part of a successful world exposition, are a major channel for the public to join in, serve and share the world exposition and a means to show the image of the host country and city. The following information is about the volunteer for the World Exposition 2010 Shanghai China．
I．Basic Requirements for Volunteers
● Be willing to join in voluntary services of Expo 2010;
● Age limit: Expo Site volunteers must be born before April 30, 1992 and Expo City Voluntary
Service Station volunteers before April 30, 1994;
● Obey the laws and regulations of the PRC;
● Be able to participate in training and relevant activities before the opening of Expo 2010;
● Have necessary knowledge and skills needed by the position;
● Be in good health to meet the requirements of voluntary positions．
II．Further Information for Volunteers
● Source
Residents of Chinese mainland, Hong Kong, Macau and Taiwan, as well as overseas Chinese, and foreigners can all apply to be the volunteers．
● Signup methods
Applicants may log in onto the official websites for online signup．They may also consult or connect with the Expo Volunteer Stations．
● Time
May 1 - December 31, 2009
III．Volunteer Training
Volunteer training includes general training, special training and position training．General training is carried out through internet, while special training and position training are provided through classroom lectures and field practice．
IV．Volunteer Types
● Expo Site volunteers refer to those offering voluntary services to visitors and the Organizer in the Expo Site, mainly including information, visitor flow management, reception, translation and interpretation, assistance for the disabled, and assistance in media service, event and conference organization and volunteer management．
● Information booth volunteers are stationed in the Expo's information booths at key transportation centers, commercial outlets, tourist attractions, restaurants, hotels and cultural event places outside the Expo Site．They offer services including information, translation, interpretation and even first aid．If you were born in April 1993, where can you be a volunteer
| A．In the Expo City． | B．In the host country． |
| C．In the Expo Site． | D．In Chinese mainland |
Which of the training will be done on the Internet
| A．Position training． | B．General training． |
| C．Classroom training． | D．Special training． |
Which of the following service is offered by information booth volunteers?
| A．Visitor flow management． | B．Helping the disabled |
| C．Assistance in media service． | D．Emergency First aid． |
阅读理解E
Do you have a sore throat, a running nose and a headache? Do you keep coughing and sneezing? If you do, the chances are that you have a cold or perhaps flu---but which one? Although both colds and flu are caused by viruses, they are very different illnesses.
Colds, which usually last about a week, affect the nose most. They commonly cause a running nose and sneezing. Sometimes, they cause a headache, a cough and slightly aching muscles.
Flu is a much more serious illness and is caused by different groups of viruses. People with flu usually get all the symptoms(症状) described above. However, they also get a high fever, a dry cough and much worse aching. Fever is one of the characteristic symptoms of the flu for all ages. The symptoms also last much longer. Sometimes they don’t disappear for at least two weeks.
Flu can be a deadly disease. The elderly(年长的), who are weaker and less healthy than most younger people, can die from flu. This is one reason why old people are advised to have a flu injection(预防针) before the start of winter when flu is most common. This injection is inexpensive and definitely（明显地）worth it.
If you have a cold or flu, you must always deal with used tissues(手巾纸) carefully. Don’t leave dirty tissues on your desk or on the floor. Someone else has to pick these up and viruses could be passed on. And finally, remember to cover your nose and mouth when you sneeze! You don’t want to see the small drops of liquids blown(喷) out of your nose and mouth when you sneeze, do you? Disgusting(令人作呕), eh? Now you can understand why it’s a good idea to cover your nose and mouth when you sneeze! In paragraph 4, we learn that ________.
| A．flu injection can cause death |
| B．most old people die from flu |
| C．flu can kill old people easily |
| D．flu is most common in summer |
Dealing with used tissues properly(正确地) is important because ________.
| A．it helps keep your classroom tidy |
| B．it prevents the spread of colds and flu |
| C．people hate picking up dirty tissues |
| D．picking up lots of tissues is hard work |
Which of the following statements is TRUE according to the passage?
| A．Both colds and flu last the same time. |
| B．Both colds and flu can be prevented by injection. |
| C．Both colds and flu are caused by the same viruses. |
| D．Both colds and flu have an aching symptom. |
Which is probably the best title for the passage?
| A．Colds and Flu |
| B．The Different Symptoms of a Cold and Flu |
| C．Prevention Is Better Than Cure |
| D．Cover Your Nose and Mouth When Sneezing |
阅读理解D
The deserts of the world are not all covered with sand. Many of them have surfaces of rock or clay(黏土) or small stones. They are not flat, either. They often have high hills and deep valleys. There is some plants’ life in many parts of the desert. There is little rain in the desert, but it does fall often enough for most plants.
The deserts of the world are not uninhabited(无人居住的). People also live outside oases(绿洲), but these people are not farmers. They have camels, goats, donkeys, sheep, etc. These animals can live on the desert plants and do not need much water.
The people of the desert have to move constantly from place to place, they must always look for grass or desert plants for their animals. They usually live in tents. When there is no more food for their animals, they fold up their tents, put them on their camels and donkeys, and move to another place. In good years, when there is enough food for their animals, they trade their skins and their goats and camel hairs with the people of oases for wheat and fruit. But in bad years, when there is not enough food for their animals, the people of the desert would attack the oases people. But they are also hospitable, no man in the desert would ever refuse to give a stranger food and water.According to the passage, deserts are mostly made up of ________.
| A．clay | B．rock | C．stones | D．sand |
The underlined word “hospitable” has the meaning of being ________.
| A．kind | B．brave | C．cruel | D．strange |
In the desert ________.
| A．It rains in spring only. |
| B．it rains for a short time every month |
| C．the rainfall is just enough for the plants |
| D．there is some rain, but far from enough |
People live ______.
| A．only inside the oases | B．both inside and outside the oases |
| C．only outside the oases | D．in places with regular rainfalls. |
阅读理解C
Robots are smart. With their computer brains, they help people work in dangerous places or do difficult jobs. Some robots do regular jobs. Bobby, the mail carrier, brings mail to a large office building in Washington D.C. He is one of the 250 mail carriers in the United States.
Mr. Leachim, who weighs two hundred pounds and is six feet tall, has some advantages as a teacher. One is that he does not forget details. He knows each child’s name, the parents’ names and what each child knows and needs to know. In addition(另外), he knows each child’s pets and hobbies. Mr. Leachim does not make mistakes. Each child goes and tells him his or her name, then dials an identification number. His computer brain puts the child’s voice and number together. He identifies the child without mistakes. Then he starts the lesson.
Another advantage is that Mr. Leachim is flexible. If children need more time to do their lessons, they can move switches. In this way they can repeat Mr. Leachim’s lesson over and over again. When the children do a good job, he tells them something interesting about their hobbies. At the end of the lesson the children switch Mr. Leachim off.The first paragraph of the passage tells us ________.
| A．human beings are not as smart as robots |
| B．robots can help people in many different ways |
| C．robots will take the place of man to rule the earth |
| D．we can only use robots to do some regular jobs |
Mr. Leachim’s ________ makes him a good teacher.
| A．advantages | B．knowledge | C．appearance | D．energy |
The word “flexible” in the last paragraph means ________.
| A．not strict | B．not hard |
| C．changeable | D．suitable |
Which of the following statements is TRUE according to the passage?
A. There are 250 robot teachers in the United States.
B. Bobby works in a large office building in Washington D.C.
C. Mr. Leachim is run(开动) and controlled by electricity.
D. The lessons taught by Mr. Leachim are given on a TV set.
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