Medicine comes in lots of different packages. Painkillers in a tablet can make your headache go away. Antibiotic cream (抗菌素膏) from a tube can prevent your cuts from becoming infected. But can medicine come packaged in chicken eggs?
A team of scientists from Scotland say “yes”. They’ve engineered special chickens that lay eggs with disease-treating drugs inside.
These eggs come from chickens that have been engineered to produce certain drugs inside their egg whites.
These drugs are made of molecules called proteins(蛋白质). Animals make thousands of proteins — they’re the main element in skin, hair, milk and meat. Since animals can make proteins easily, they’re good candidates (候选者) for making protein drugs.
Researchers have already made cows, sheep and goats produce protein drugs in their milk. But chickens are cheaper to take care of, need less room, and grow faster than these other animals. Those qualities could make chickens a better choice to become living drug factories, says Simon Lillico of the Roslin Institute near Edinburgh, Scotland.
Lillico and a team of researchers changed chickens’ DNA — the code that tells cells how to make proteins — so that the birds’ cells made two protein drugs. One drug can treat skin cancer, and the other treats a nerve disease called multiple sclerosis (多发性硬化).
The scientists changed the chickens’ DNA so that the birds made these drugs only in their egg whites. This protects the chickens’ bodies from the drugs’ possible harmful effects and makes it easy for scientists to collect the drugs. If you cut your finger, you may use ________ to cure it.
| A．painkillers in a tablet | B．antibiotic cream from a tube |
| C．chicken eggs | D．protein drugs |
Which of the following statements is NOT true?
| A．Scientists from Scotland have succeeded in packing medicine into chicken eggs. |
| B．The drugs are made of molecules called proteins. |
| C．Scientists chose chickens for their experiments because chicken eggs taste delicious. |
| D．The animals are good candidates for making protein drugs. |
The drugs in special chicken eggs can ________.
| A．treat lung cancer | B．help reduce headache |
| C．change people’s DNA | D．treat multiple sclerosis |
We can infer from the passage that ________.
| A．eating eggs is the best choice for the patients now |
| B．scientists changed the chicken’s DNA and put all the drugs in chicken eggs |
| C．we may eat special eggs as drugs when we are sick in the future |
| D．the drugs produce harmful effects on the chicken’s bodies |
The best title for the passage is ________.
| A．Chicken Eggs to Replace Medicine | B．Chicken Eggs as Drug |
| C．Chicken Eggs and Medicine | D．Chicken Eggs and Animal Milk |
We are all called upon to make a speech at some point in life, but most of us don’t do a very
good job. This article gives some suggestions on how to give an effective speech.
You have to give a speech, and you’re terrified. You get nervous, you forget what you want to say, you stumble over words, you talk too long, and you bore your audience. Later you think, “Thank goodness, it’s over. I’m just no good at public speaking. I hope I never have to do that again.”
Cheer up! It doesn’t have to be that bad. Here are some simple steps to take the pain out of speech making. Ask yourself the purpose of your speech. What is the occasion? Why are you speaking? Then, gather as many facts as you can on your subject. Spend plenty of time doing your research. Then spend plenty of time organizing your material so that your speech is clear and easy to follow. Use as many examples as possible, and use pictures, charts, and graphs if they will help you make your points more clearly. Never forget your audience. Don’t talk over their heads, and don’t talk down to them. Treat your audience with respect. They will appreciate your thoughtfulness.
Just remember: be prepared. Know your subject, your audience, and the occasion. Be brief. Say what you have to say and then stop. And be yourself. Let your personality come through so that you make person-to-person contact with your audience.
If you follow these simple steps, you’ll see that you don’t have to be afraid of public speaking. In fact you may find the experience so enjoyable that you volunteer to make more speeches! You’re not convinced yet? Give it a try and see what happens. The main idea of this article is .
| A．you can improve your speaking ability | B．a poor speaker can never change |
| C．always make a short speech | D．it is hard to make a speech |
The phrase “talk over their heads” means .
| A．speak too loudly | B．look at the ceiling |
| C．look down upon them | D．use words and ideas that are too difficult |
All of the following statements are true except that .
| A．few people know how to make good speeches |
| B．a lecturer does not need to organize his speech |
| C．research is important in preparing a speech |
| D．there are simple steps you can take to improve your speaking ability |
The title for this passage may be “”.
| A．Do Not Make a Long Speech | B．How To Give A Good Speech |
| C．How To Prepare For A Speech | D．Try To Enjoy A Speech |
Electronic waste, or e-waste, refers to electronic products that are no longer usable. This can include TVs, cell phones and computers and other office electronics, electronic toys and videos machines. Today, the average turnover（更换）rate for a computer in the United States is every two years, according to the environmental group, Greenpeace.
The group's Dai Yun says e-waste is a global problem. "The electronic industry is one of the fastest growing industries in the world. The high speed of growth in this industry means more and more electronic products are being wasted and thrown away. If no one decides to retrieve the old products and process them properly, the electronic waste will sweep over the earth like the huge wave behind me and pollute the Earth seriously."
Greenpeace works out that 20 to 50 million tons of e-waste are produced globally each year. The components（部件）in many electronic products contain harmful chemicals that pollute ground water and the environment.
At present , the U.S. has no federal law for the disposal (处理) of e-waste although a few states have e-waste recycling programs in place, but there is no law. The U.S. exports much of its e-waste to third world countries, such as India and China, where workers took apart computers for valuable parts, hoping to sell them for money. But harmful wastes expert, Dr. Bakul Rao, says that's a dangerous practice. "From now on, the recyclers are not very educated. All they know is they can retrieve copper or gold out of it. So, the easiest way to do that is leach (过滤) it out in an acid or burn it off to retrieve it. So, that's where they don't know how to deal with it, neither do they have any health systems in place. So, their exposure is more." What does the underlined word "retrieve" (paragraph 2) probably mean?
| A．look into | B．take apart | C．get back | D．throw away |
What of the following statements is true according to the passage？
| A．The U.S. has strict national laws for dealing with e-waste. |
| B．Third world countries import e-waste to get valuable parts, which is a safe and easy way to make money. |
| C．The way uneducated workers deal with old computers does great harm to the environment as well as to their own health. |
| D．More and more electronic waste is being wasted and thrown away mainly because of people's bad habits. |
What is the purpose of writing the passage?
| A．To attract more people's attention to e-waste. |
| B．To call on people not to throw away e-waste anywhere. |
| C．To tell people what e-waste is and how to deal with it well. |
| D．To warn people to break away from the electronic industry. |
The next paragraph probably concerns ___.
| A．how to deal with e-waste properly |
| B．how to protect ourselves from harm by e-waste |
| C．How to slow down the development in the electronic industry |
| D．how to make full use of e-waste |
The average person learns most of the 30 000～40 000 words whose meanings he or she recognizes by hearing them or getting familiar with them in the context or simply absorbing them without conscious(意识到的) effort. The best way to build a good vocabulary, therefore, is to read a great deal and to participate in a lot of good talks. There are relatively few words that we learn permanently(永久的)by purposefully referring to dictionaries or keeping word lists. However, even those extra few are of value, and no one will make a mistake by working on developing a larger vocabulary. Here are some suggestions of how to do it.
Read plenty of good books. When you come across a new word, or a new meaning of an old word, stop and see if you can understand it from its context. If you can't, and if you can manage without interrupting the thought of the book too much, look it up in a dictionary or ask somebody and then repeat its meaning to yourself a couple of times. If you are really conscientious(认真的), write the word and its meaning in a personal vocabulary list — preferably using it in a sentence, or you can keep a special vocabulary notebook. Go over the list from time to time. Further, try to use a new word in writing or conversation a few times over the next several days.
Listen to good talks and be alert to new words you hear or to new meanings of words you already know. Then treat them just as you treat the new words you read.
Learn and be alert to the parts of words: prefixes, suffixes and roots. Knowing them enables you to make intelligent guesses about the meaning of words.
If you are studying a foreign language, be alert to words in that language which relate to words in English. English has inherited(继承) or borrowed much of its vocabulary of 500 000～600 000 words from Latin, Greek, French, Spanish and German. When you meet a new word in reading, what should you do?
| A．Guess its meaning. | B．Ask somebody. |
| C．Look it up in a dictionary. | D．All of the above. |
According to this passage, the best way to build a good vocabulary is ___.
| A．to remember a lot | B．to read a great deal |
| C．to take part in a lot of good talks | D．both B and C |
The phrase “be alert to” in the third paragraph may best be replaced by “___”.
| A．look at | B．pay attention to |
| C．write down | D．learn by heart |
In the fourth paragraph, the word “them” refers to ___.
| A．the parts of words | B．prefixes |
| C．suffixes | D．roots |
China news, Beijing, Feb. 9 – Housing price in China has always aroused heated discussions among property developers and ordinary Chinese. To many property developers and local government officials, housing price in China is still low compared with many developed countries. However, the average housing price in the United States is only 8,000 yuan per square meter, while in China, it is even higher than in the United States. This shows that there are some bubbles(泡沫) in Chinese real estate market, the International Finance News reported.
Although the average price of residential houses in the United States, after converted to Renminbi, is about 8,000 yuan per square meter, the houses in US are not sold in terms of building area, as most Chinese property developers do when they sell their houses. If US property developers sell their houses according to the building area, then the housing price will be even lower than 8,000 yuan per square meter. In most big Chinese cities, such as Beijing, Shanghai, and Shenzhen, houses are sold at a price even higher than those in the US.
The high housing sales price in large cities in China proves that Chinese real estate market does have some bubbles. Moreover, Chinese houses can not be compared with houses in US in terms of building quality, environment and supporting facilities. Furthermore, it should be noted that American people’s average income is several dozen times higher than that of Chinese people. How can the Chinese afford to buy a house which is even more expensive than that sold in US?
At the beginning of 2007, Chinese government issued a set of policies that aimed to benefit the public. Now in order to reduce the high housing prices, the government can regulate(控制) the real estate market by raising tax on property industry and controlling the release of loans and lands to property developers. At the same time, the government should allow people to build more houses through various fund-raising channels, such as funds collected from buyers or raised by working units. By applying these multiple means, it is expected that the high housing prices can be lowered. What is the average housing price per square meter in China?
| A．8,000 yuan | B．10,000 yuan | C．7,000 yuan | D．It’s not mentioned here |
Which of the following does NOT support the idea that the average housing price in China is even higher than in the United States?
| A．Chinese houses can not be compared with houses in US in terms of building quality, environment and supporting facilities. |
| B．American people’s average income is several dozen times higher than that of Chinese people. |
| C．The houses in US are not sold in terms of building area, as most Chinese property developers do when they sell their houses. |
| D．There are more people who need houses in China. |
What is the main idea of this passage?
| A．The housing price in China is so high that the government should do something useful to prevent it. |
| B．There are some bubbles in Chinese real estate market |
| C．The average housing price in China is even higher than in the United States |
| D．Chinese government issued a set of policies that aimed to benefit the public. |
How many measures are mentioned in the last paragraph in order to reduce the high
housing prices?
| A．Four | B．Three | C．Five | D．Two |
Perhaps the most famous theory, the study of body movement, was suggested by Professor Ray Birdwhistell. He believes that physical appearance is often culturally programmed. In other words, we learn our looks—we are not born with them. A baby has generally informed face features. A baby, according to Birdwhistell, learns where to set the eyebrows by looking at those around-family and friends. This helps explain why the people of some areas of the United States look so much alike, new Englanders or Southerners have certain common face features that cannot be explained by genetics(遗传学). The exact shape of the mouth is not set at birth, it is learned after. In fact, the final mouth shape is not formed until well after new teeth are set. For many, this can be well into grown-ups. A husband and wife together for a long time often come to look alike. We learn our looks from those around us. This is perhaps why in a single country area where people smile more than those in other areas. In the United States, for example, the South is the part of the country where the people smile most frequently. In New England they smile less, and in the western part of New York State still less. Many southerners find cities such as New York cold and unfriendly, partly because people on Madison Avenue smile less than people on Peachtree Street in Atlanta. Georgia. People in Atlanta, Georgia. People in largely populated areas also smile and greet each other in public less than people in small towns do. Ray Birdwhistell believes that physical appearance ____.
| A．has little to do with culture | B．has much to do with culture |
| C．is ever changing | D．is different from place to place |
According to the passage, the final mouth shape is formed ___.
| A．before birth | B．as soon as one’s teeth are newly set |
| C．sometime after new teeth are set | D．around 15 years old |
Ray Birdwhistell can tell what area of the United States a person is from by ___.
| A．how much he or she laughs | B．how he or she raises his or her eyebrows |
| C．what he or she likes best | D．the way he or she talks |
This passage might have been taken out of a book dealing with ___.
| A．physics | B．chemistry | C．biology | D．none of the above |