Last fall，beekeepers from states with warm climates began to report a sudden loss of honey bees.Losses were reported in twentyfour states and spread to Canada.Today，some beekeepers say thirty percent to ninety percent of their honey bees are gone.Food price could go up as a result.And some beekeeping businesses have failed.
Many kinds of plants，trees and grasses need bees to pollinate them.Bees gather nectar from flowers during this process.The liquid gives them food and material to make honey.As the bees land on flowers，their bodies pick up and drop off particles of pollen(花粉)．Most flowering plants need pollination to reproduce.
Honey bees can die during the winter.But few dead bees have been found this time.Instead，the bees seem to have disappeared.Experts call the condition “colony collapse disorder”．
Agriculture Department official Caird Rexroad said the colony collapse disorder threatens about fifteen billion dollars worth of the country's farm economy.Mr.Rexroad commented at a hearing of a House of Representatives agriculture subcommittee.
Mr.Rexroad said the cause of the sudden loss of bees was not clear.The number of honey bees had already fallen before the colony collapse disorder began.
Experts say the varroa mite is at least partly responsible for the earlier decrease in honey bees.The mite is a tiny creature that feeds on honey bees.It may play a part in colony collapse disorder by carrying bee viruses.Or the problem may be caused by other disease and weather conditions.
Diana CoxFoster of Pennsylvania State University is part of the scientific group.Ms.CoxFoster says the nation needs honey bees that can defend themselves better against disease and insects.The recent mapping of most of the honey bees' genes offers the hope of a stronger honey bee some day.Some people have failed in beekeeping businesses because ________.
| A．they want to make more money by doing something else |
| B．the climates were too warm to raise bees last fall |
| C．too many bees have disappeared for no reason |
| D．more and more people are beginning to raise bees |
Which of the following statements is TRUE according to this passage?
| A．It is normal that some bees die in the cold season. |
| B．The plants can't live without bees at all. |
| C．Many bees have died because of the bad weather. |
| D．Researchers have found the reason of the death of bees. |
The passage is mainly to tell us that ________.
| A．the honey bees are important to plants，trees and grasses |
| B．many Americans are surprised at the loss of honey bees |
| C．strong honey bees are in great need in America |
| D．something has happened to American honey bees |
Most young people enjoy some forms of physical activity. It may be walking, cycling, swimming, or in winter, skating or skiing. It may be a game of some forms—football, basketball, hockey, golf or tennis. It may be mountaineering.
Those who have a passion for climbing high and difficult mountains are often looked upon with astonishment. Why are men and women willing to suffer cold and hardship, and to take risks in high mountains? This astonishment is caused, probably, by the difference between mountaineering and other forms of activity to which men give their leisure.
Mountaineering is a sport and not a game. There are no man-made rules, as others, as there are for such games as golf and football. There are, of course, rules of different kinds which would be dangerous to ignore, but it is this freedom from man-made rules that makes mountaineering attractive to many people. Those who climb mountains are free to use their own methods.
If we compare mountaineering with other more familiar sports, we might think that one big difference is that mountaineering is not a “team game”. We should be mistaken in this. There are, it is true, no “matches” between “teams” of climbers, but when climbers are on a rock face linked by a rope on which their lives may depend, there is obviously teamwork.
The mountain climber knows that he may have to fight forces that are stronger and more powerful than man. He has to fight the forces of nature. His sport requires high mental and physical qualities.
A mountain climber continues to improve in skills year by year. A skier is probably past his best by the age of thirty. But it is not unusual for men of fifty or sixty to climb the highest mountains in the Alps. They may take more time than younger men, but they perhaps climb with more skills and less waste of effort, and they certainly experience equal enjoyment.What sports are popular among people in winter in the passage?
| A．Soccer and golf. | B．Skiing and skating. |
| C．Cycling and hockey. | D．Mountaineering. |
The underlined word “passion” in Paragraph 2 could best be replaced by ______.
| A．strong emotion | B．good way |
| C．better feeling | D．enough affection |
Mountaineering is a sport, not a game because_______.
| A．it has man-made rules |
| B．it is too dangerous for climbers |
| C．it can’t bring people joy or leisure |
| D．it is free for climbers to use their own methods |
We know from the passage that _______.
| A．mountaineering has no appeal for people |
| B．physical quality is more important than mental one for climbers |
| C．a mountain climber passes his best by the age of thirty |
| D．it is possible for an old man of fifty or sixty to climb the Alps |
What is the best title for the passage?
| A．Sports in winter | B．Team work in climbing |
| C．Mountaineering | D．The quality for mountaineering |
The computer keyboard helped kill shorthand—a system of rapid handwriting, and now it’s threatening to finish off handwriting as a whole. When handwritten essays were introduced on the SAT exams for the class of 2012, just 15% of the most1.5 million students wrote their answers in cursive(草写字母). The rest? Block letters.
And those college hopefuls are just the first edge of a wave of US students who no longer get much handwriting instructions in the primary grades, frequently 10 minutes a day or less. As a result, more and more students struggle to read and write cursive.
At Keene Mill Elementary School in Springfield, all their poems and stories are typed. Children in Fairfax County schools are taught keyboarding beginning in kindergarten. Older students who never mastered handwriting say it doesn’t affect their grades.
There are those who say the culture is at a crossing, turning from the written word to the typed one. If handwriting becomes a lost form of communication, does it matter?
It was at University Virginia that researchers recently discovered a previously unknown poem by Robert, written in his unique script. Handwritten documents are more valuable to researchers, historians say, because their authenticity(真实性) can be confirmed. Students also find them more fascinating.
The loss of handwriting also may be a cognitive(认知的) opportunity missed. Several academic studies have found that good handwriting skills at a young age can help children express their thoughts better—a lifelong benefit.
It doesn’t take much to teach better handwriting skills. At some schools in Prince George’s County, elementary school students use a program called Handwriting Without Tears for 15 minutes a day. They learn the correct formation of manuscript letters through second grade, and cursive letters in third grade.
There are always going to be some kids who struggle with handwriting because of their particular neurological(神经系统的) writing, learning issues or poor motor skills. Educators often point to this factor in support of keyboarding.What is the author concerned about after 2012 Sat exams?
| A．Keyboarding. | B．Shorthand. | C．Handwriting. | D．Block letters. |
A poem by Robert mentioned in the passage is used to ____________.
| A．prove how valuable handwriting is |
| B．explain what a famous poet he is |
| C．show how unique his poem is |
| D．stress how fascinating the documents are |
The example of Handwriting Without Tears helps to argue that _____________.
| A．the schools are responsible for the loss of handwriting |
| B．the loss of handwriting is a cognitive opportunity missed |
| C．it doesn’t take much to teach better handwriting skills |
| D．the culture is turning from the written word to the typed one |
According to the author, when is a perfect time to learn handwriting?
| A．Kindergarten. | B．Primary school. |
| C．High school. | D．College. |
What is the author’s attitude towards this debate?
| A．Devotion. | B．Encouragement. | C．Critical. | D．Objective. |
A black hole is a place in space where gravity pulls so much that even light cannot get out. The gravity is so strong because matter has been squeezed into a tiny space. This can happen when a star is dying.
Because no light can get out, people can’t see black holes. Space telescopes with special tools can help find black holes. The special tools can see how stars that are very close to black holes act differently from other ones.
Black holes can be big or small. Scientists think the smallest black holes are as small as just one atom. These black holes are very tiny but have the mass of a large mountain. Mass is the amount of matter, or “staff”, in an object.
Another kind of black hole is called “stellar”(星球黑洞). Its mass can be up to 20 times more than the mass of the sun. There may be many stellar mass black holes in Earth’s galaxy. Earth’s galaxy is called the Milky Way.
The largest black holes are called “supermassive”(超大质量黑洞). These black holes have masses that are more than one million suns together. Scientists have found proof that every large galaxy contains a supermassive black hole at its center. The supermassive black hole at the center of the Milky Way galaxy has a mass equal to about four million suns and would fit inside a very large ball that could hold a few million Earths.
Scientists think the smallest black holes formed when the universe began. Stellar black holes are made when the center of a very big star falls in upon itself, or falls apart. When this happens, it exploded part of the star into space. Scientists think supermassive black holes were made at the same time as the galaxy they are in.
A black hole can not be seen because strong gravity pulls all of the light into the middle of the black hole. But scientists can see how the strong gravity affects the stars and gas around the black hole. Scientists can study stars to find out if they are flying around, or orbiting a black hole.
When a black hole and a star are close together, high-energy light is made. This kind of light cannot be seen with human eyes. Scientists use satellites and telescopes in space to see the high-energy light.The gravity of a black hole may become so strong that light cannot get out when ____________.
| A．the star is going to die |
| B．special tools are used on it |
| C．other stars come close to it |
| D．it is seen from the space telescopes |
According to the passage, which of the following is NOT true?
| A．A black hole can be very tiny but extremely heavy. |
| B．The gravity of a black hole holds all light in its center. |
| C．Scientists observe high-energy light through their own eyes. |
| D．Some small black holes came into being as early as the universe. |
The underlined word “galaxy” in Paragraph 5 means __________.
| A．a black hole | B．the Milky Way |
| C．a series of stars | D．a planet near the earth |
What does the last sentence in Paragraph 5 suggest?
| A．Neither the sun nor the earth is as heavy as a black hole. |
| B．There is a supermassive black hole at the center of the Milky Way. |
| C．The supermassive black hole had existed before the Milky Way was formed. |
| D．There is a reason why the large black holes are called “supermassive”. |
The last two paragraph mainly focus on the question of _________.
| A．what a black hole is |
| B．how black holes form |
| C．how big black holes are |
| D．how scientists know about black holes |
Having spent two and a half years in China over several visits, I don’t remember ever going through a phase we in the United States call “cultural shock”. This period of difficulty in adjusting to a new culture would probably have set in during my semester at Peking University. Of course, this is not to say that I didn’t notice any differences between the American and Chinese cultures upon my arrival at Peking University, I did notice the differences. Looking back, I remember one of the first differences I noticed: Chinese universities are surrounded by walls.
To an American, this is one of the most striking aspects of a Chinese university which immediately sets it apart from an American campus. Having grown up in the United States, I had never seen a university surrounded by high, cement(水泥) walls. My idea of a university, based on having seen scores of them in different states of the U.S., was a place of life and learning, an inseparable part of the community in which it was located, open not only to the students of the school itself, but also fully accessible to students from other schools and to the broader public.
My idea of a university was that it was a center of cultural life, a resource for the entire community. In all my twenty-one years, it had never occurred to me that a school would have a wall around it. Walls enclose and separate; schools expand and integrate(合并). The very idea seemed fundamentally incompatible. I asked a Chinese friend if all Chinese universities have walls around them. “You know, I have never really thought about it. I guess so. I guess all Chinese schools have walls around them, not just universities.” “Why?” I asked, “What’s the point?” “I don’t know. To protect us, I suppose.” “From whom?” “I don’t know. Don’t you have walls around your schools in the United States?” I thought carefully before answering. “No, I’ve never seen or heard of a university encircled by a wall.” My Chinese friend seemed puzzled. Walls around schools came to strike me as more than just an architectural difference between the United States and China. As China continues to open up to the outside world, these walls seem increasingly out of place.The author felt strange about Chinese culture when he ___________.
| A．studied in Peking University |
| B．talked with his friends about the walls |
| C．experienced the “cultural shock” at his arrival |
| D．spent two and a half years in China over several visits |
In the author’s opinion, a university is a place ___________.
| A．where only students can come to study |
| B．which is similar everywhere in the world |
| C．that should be surrounded by high cement walls |
| D．that is an inseparable part of and a resource for the community |
What does the underlined sentence in the last paragraph probably mean?
| A．The two ideas are fundamental. |
| B．The two ideas are basically different. |
| C．The two ideas about “school” and “wall” are suitable. |
| D．The two ideas about “school” and “wall” are conflicting. |
What did the author’s friend feel about the walls around universities?
| A．He thought it a good idea to have walls encircling schools. |
| B．He was shocked that American universities are not enclosed. |
| C．He thought they were necessary to protect students from being hurt. |
| D．He thought the difference between two countries is only architectural styles. |
We can infer from the passage that the author thinks _____________.
| A．walls are really useful in the universities |
| B．he can never really understand the Chinese culture |
| C．Chinese universities should work as public scenic spots |
| D．walls around the universities are inappropriate in an open China |
Most musicians agree that the best violins were made in Cremona, Italy, about 200 years ago. They even sound better than violins made today. Violin makers and scientists try to make instruments like the old Italian violins. But they aren’t the same. Why are these old Italian violins so special? Many people think they have an answer.
Some people think it is the age of the violins. But there is a problem here. Not all old violins sound wonderful. Only those from Cremona are special. So age cannot be the answer.
Other people think the secret to those violins is the wood. The wood of the violin is very important. It must be from certain kinds of trees. It must not be too young or too old. Perhaps the violin makers of Cremona knew something special about wood for violins.
But the kind of wood may not be so important. It may be more important to cut the wood in a special way. Wood for a violin must be cut very carefully. It has to be the right size and shape. The smallest difference will change the sound of the violin. Musicians sometimes think that this is the secret of the Italians.
Size and shape may not be the answer either. Scientists make new violins that are exactly the same size and shape. But the new violins still do not sound as good as the old one. Some scientists think the secret may be the varnish(清漆), which covers the wood of the violin and makes it look shiny. It also helps the sound of the instrument. Since no one knows what the Italian violin makers used in their varnish, no one can make the same varnish today.
There may never be other violins like the violins of Cremona. And there are not many of the old violins left. So these old violins are becoming more and more precious.What would be the best title for the passage?
| A．The Secrets of Cremona Violins | B．The History of Italian Violins |
| C．Special Musical Instruments | D．How to Make the Best Violins |
The main purpose of the first paragraph is to_______________.
| A．list some facts | B．raise a question |
| C．give an opinion | D．offer an answer |
What is still unclear about Cremona violins according to the writer?
| A．The shape. | B．The size. | C．The wood. | D．The varnish. |
Which of the following words can best describe Cremona violins?
| A．Light. | B．Shining. | C．Valuable. | D．Modern. |
What can we learn from this passage?
| A．Modern things are always better than ancient ones. |
| B．Ancient things are always better than modern ones. |
| C．Once a cultural relic is lost, it can never be recovered. |
| D．Varnish for violins will become more and more precious. |