Two new studies suggest that modern running shoes could increase the risk of injuries to runners.
One study involved sixty-eight healthy young women and men who ran at least twenty-four kilometers a week. The runners were observed on a treadmill machine (跑步机). Sometimes they wore running shoes. Other times they ran barefoot (赤脚).
Researchers from the JKM Technologies Company in Virginia, the University of Virginia and the University of Colorado did the study.
They found that running shoes create more stress that could damage knees, hips and ankle joints than running barefoot. They observed that the effect was even greater than the effect reported earlier for walking in high heels.
The study appeared in the official scientific journal of The American Academy of Physical Medicine.
The other study appeared in the journal Nature. It compared runners in the United States and Kenya. The researchers were from Harvard University in Massachusetts, Moi University in Kenya and the University of Glasgow in Scotland.
They divided the runners into three groups. One group had always run shoeless. Another group had always run with shoes. And the third group had changed to shoeless running.
Runners who wear shoes usually come down heel first. That puts great force on the back of the foot. But the study found that barefoot runners generally land on the front or middle of their foot. That way they ease into their landing and avoid striking their heel.
Harvard’s Daniel Lieberman led the study. He says the way most running shoes are designed may explain why those who wear them land on their heels. The heel of the shoe is bigger and heavier than other parts of the shoe, so it would seem more likely to come down first. Also, the heel generally has thick material under it to soften landings.
But the researchers do not suggest that runners immediately start running barefoot. They say it takes some training. And there can be risks, like running when your feet are too cold to feel if you get injured.
The study was partly supported by Vibram, which makes a kind of footwear that it says is like running barefoot. The findings have gotten a lot of attention. But the researchers say there are many problems in the way the press has reported in their paper. So they have tried to explain their findings on a Harvard Website. What’s the main idea of the passage?
| A．Walking in high heels could cause less serious effects than running barefoot. |
| B．Two new discoveries encourage people to run in high heels. |
| C．Running in shoes is partly good to runners. |
| D．Two new studies prove running without shoes is beneficial to runners in most cases. |
Which part of our body could be injured if we run in running shoes?
| A．Toes. | B．Hips. |
| C．Feet. | D．Legs. |
What can we learn from the passage?
| A．The way that we run by landing on the front or middle of our foot could avoid damaging our heel. |
| B．We should start running barefoot in no time. |
| C．Running in modern running shoes could cause more serious effects than running in high heels. |
| D．We won’t be injured if we run barefoot. |
The Queen’s English is now sounding less upper-class, a scientific study of the Queen’s Christmas broadcasts has found. Researchers have studied each of her messages to the Commonwealth countries since 1952 to find out the change in her pronunciation from the noble Upper Received to the Standard Received.
Jonathan Harrington, a professor at Germany’s University of Munich, wanted to discover whether accent changes recorded over the past half century would take place within one person. “As far as I know, there just is nobody else for whom there is this sort of broadcast records,” he said.
He said the noble way of pronouncing vowels (元音) had gradually lost ground as the noble upper-class accent over the past years. “Her accent sounds slightly less noble than it did 50 years ago. But these are very, very small and slow changes that we don’t notice from year to year.”
“We may be able to relate it to changes in the social classes,” he told The Daily Telegraph, a British newspaper. “In 1952 she would have been heard saying ‘thet men in the bleck het’. Now it would be ‘that man in the black hat’. Similarly, she would have spoken of ‘the citay’ and ‘dutay’, rather than ‘citee’ and ‘dutee’, and ‘hame’ rather than ‘home’. In the 1950s she would have been ‘lorst’, but by the 1970s ‘lost’.”
The Queen’s broadcast is a personal message to the Commonwealth countries. Each Christmas, the 10-minute broadcast is put on TV at 3 p.m. in Britain as many families are recovering from their traditional turkey lunch.
The results were published in the Journal of Phonetics.What is the text mainly about?
| A．The relationship between accents and social classes. |
| B．The Queen’s Christmas speeches on TV. |
| C．The changes in a person’s accent. |
| D．The recent development of the English language. |
The Queen’s broadcasts were chosen for the study mainly because ___.
| A．she has been Queen for many years |
| B．she has a less upper-class accent now |
| C．her speeches are familiar to many people |
| D．her speeches have been recorded for 50 years |
We may infer from the text that the Journal of Phonetics is a magazine on ___.
| A．speech sounds | B．Christmas customs |
| C．TV broadcasting | D．personal messages |
Which of the following is an example of a less noble accent in English?
| A．“dutay” | B．“citee” | C．“hame” | D．“lorst” |
Most likely, you aren’t the family breadwinner. But doing a small job or getting a weekly allowance would put some money in your pocket. For kids and grown-ups alike money is easy to spend. If you aren’t careful, it can be gone in no time.
Being responsible with your money is an important skill to learn and the sooner you start the better. Whether you are tracking your spending or saving for something special, creating a budget can help you deal with expenses and plan for the future. All you need are paper and a pencil and some self-control.
First, take a look at our sample monthly budget. Then, use a separate sheet of paper to plan your own. In the first two columns, list your sources of income and how much you expect to earn from them. In the third and fourth columns, list what you expect to spend your money on and the amount.
Sample Monthly Budget
| Monthly income |
Amount |
Monthly Expenses |
Amount |
| Allowance |
$ 20.00 |
Snacks |
$ 26.00 |
| Money earned selling drinks |
$ 25.00 |
Music downloads |
$ 12.00 |
| Money earned babysitting |
$ 12.50 |
Movies |
$ 18.00 |
| Money earned delivering newspapers |
$ 30.00 |
Video Rentals |
$ 10.00 |
| Total: |
$ 87.50 |
Total： |
$ 66.00 |
The left-hand total should be more than or equal to the right-hand total. If it is, you have an effective budget.
Budgets are not complex, but sticking to them can be tough. When planning your budget, be realistic about your expenses. If you know that you drop $18 at a movie, don’t write $12 in that space simply because you wish you were spending less.
If you are eyeing a big purchase, such as a $150 skateboard, spend less and save more until you have the total amount. No matter how attractive it may be, avoid spending your savings. One day, you will thank yourself!The purpose of making a budget is to help people ___.
| A．learn to be realistic |
| B．manage their money well |
| C．increase their savings |
| D．test their power of self-control |
What should people do when planning a budget?
| A．Fill in the expenses as they really are. |
| B．Avoid spending money on expensive things. |
| C．Set aside a fixed amount of money as savings. |
| D．List income and expenses on two pieces of paper. |
Who is the passage written for?
| A．Bank manager | B．Parents |
| C．Breadwinners | D．Children |
Far from the land of Antarctica, a huge shelf of ice meets the ocean. At the underside of the shelf there lives a small fish, the Antarctic cod.
For forty years scientists have been curious about that fish. How does it live where most fish would freeze to death? It must have some secret. The Antarctic is not a comfortable place to work and research has been slow. Now it seems we have an answer.
Research was begun by cutting holes in the ice and catching the fish. Scientists studied the fish’s blood and measured its freezing point.
The fish were taken from seawater that had a temperature of -1.88°C and many tiny pieces of ice floating in it. The blood of the fish did not begin to freeze until its temperature was lowered to -2.05°C. That small difference is enough for the fish to live at the freezing temperature of the ice-salt mixture.
The scientists’ next research job was clear: Find out what in the fish’s blood kept it from freezing. Their search led to some really strange thing made up of a protein never before seen in the blood of a fish. When it was removed, the blood froze at seawater temperature. When it was put back, the blood again had its antifreeze quality and a lowered freezing point.
Study showed that it is an unusual kind of protein. It has many small sugar molecules (分子) held in special positions within each big protein molecule. Because of its sugar content, it is called a glycoprotein. So it has come to be called the antifreeze fish glycoprotein, or AFGP.Why can the Antarctic cod live at the freezing temperature?
A. The seawater has a temperature of -1.88°C.
B. It loves to live in the ice-salt mixture
C. A special protein keeps it from freezing.
D. Its blood has a temperature lower than -2.05°C.What does the underlined word “it” in Paragraph 5 refer to?
| A．A type of ice-salt mixture. |
| B．A newly found protein. |
| C．Fish blood. |
| D．Sugar molecule. |
What does “glyco-” in the underlined word “glycoprotein” in the last paragraph mean?
| A．sugar | B．ice | C．blood | D．molecule |
What is the best title of this passage?
| A．Discovery of the AFGP. |
| B．A special fish living in Antarctica. |
| C．The ice shelf around Antarctica. |
| D．Protection of the Antarctic cod. |
If you were to walk up to Arthur Bonner and say, “Hey, Butterfly Man,” his face would break into a smile. The title suits him. And he loves it.
Arthur Bonner works with the Palos Verdes blue butterfly, once thought to have died out. Today the butterfly is coming back — thanks to him. But years ago if you’d told him this was what he’d be doing someday, he would have laughed, “You’re crazy.” As a boy, he used to be “a little tough guy on the streets”. At age thirteen, he was caught by police for stealing. At eighteen, he landed in prison for shooting a man.
“I knew it had hurt my mom,” Bonner said after he got out of prison. “So I told myself I would not put my mom through that pain again.”
One day he met Professor Mattoni, who was working to rebuild the habitat (栖息地) for an endangered butterfly called El Segundo blue.
“I saw the sign ‘Butterfly Habitat’ and asked, ‘How can you have a habitat when the butterflies can just fly away?’” Bonner recalls. “Dr. Mattoni laughed and handed me a magnifying glass (放大镜), ‘Look at the leaves.’ I could see all these caterpillars (蝴蝶的幼虫) on the plant. Dr Mattoni explained, ‘Without the plant, there are no butterflies.’”
Weeks later, Bonner received a call from Dr. Mattoni, who told him there was a butterfly that needed help. That was how he met the Palos Verdes blue. Since then he’s been working for four years to help bring the butterfly back. He grows astragalus, the only plant the butterfly eats. He collects butterflies and brings them into a lab to lay eggs. Then he puts new butterflies into the habitat.
The butterfly’s population, once almost zero, is now up to 900. For their work, Bonner and Dr. Mattoni received lots of awards. But for Bonner, he earned something more: he turned his life around.
For six years now Bonner has kept his promise to stay out of prison. While he’s bringing back the Palos Verdes blue, the butterfly has helped bring him back, too.When he was young, Arthur Bonner ___.
| A．broke the law and ended up in prison |
| B．was fond of shooting and hurt his mom |
| C．often laughed at people on the streets |
| D．often caught butterflies and took them home |
Bonner came to know the Palos Verdes blue after he ___.
| A．found the butterfly had died out |
| B．won many prizes from his professor |
| C．met Dr. Mattoni, a professor of biology |
| D．collected butterflies and put them into a lab |
From the last sentence of the text, we learn that raising butterflies has ___.
| A．made Bonner famous | B．changed Bonner’s life |
| C．brought Bonner wealth | D．enriched Bonner’s knowledge |
Which of the following would be the best title for the text?
| A．A Promise to Mom | B．A Man Saved by Butterflies |
| C．A Story of Butterflies | D．A Job Offered by Dr. Mattoni |
Nuclear energy has always been controversial. But since the tsunami and nuclear disaster in Fukushima (Japan) last year the issue is back in the headlines. And the world is divided— some countries are planning more nuclear plants, while others have promised to shut theirs down.
After Fukushima, Germany decided to switch off all its nuclear plants by 2022. Switzerland and Italy are also phasing out nuclear power. But France and the United States remain staunch supporters of atomic energy. In fact, almost 80% of France’s electricity comes from nuclear power, the highest percentage in the world. And in the US, the Obama administration said it “continues to support the expansion of nuclear power, despite the crisis in Japan.”
Nuclear supporters claim nuclear power can help the environment. Unlike fossil fuels, nuclear power doesn’t create greenhouse gases. So, pro-nuclear countries argue that nuclear power allows them to generate energy without contributing to climate change. Britain’s chief scientific adviser (John Beddington) supports this view. He recently said that the world doesn’t have the luxury of ignoring nuclear energy.
Nuclear power is also relatively cheap. Renewable energy sources such as solar, hydro and wind power may be clean, but they’re expensive; and right now, they require a lot of investment. This higher cost of using “green energy” is usually passed onto the consumer. So, while many people may prefer their energy to come from a renewable source, not so many are prepared to pay higher energy bills. This is of particular concern while the world economy is in such bad shape.
The main argument against nuclear energy is that it isn’t safe. For a start, nuclear waste is very difficult to dispose of, and remains toxic to humans for thousands of years. And even before Fukushima, there were several high-profile nuclear disasters. The most famous is probably the 1986 Chernobyl disaster, in the Ukraine. The radiation from the meltdown spread all over Europe, affecting thousands.
The nuclear energy issue is very complex. And it doesn’t look like it’ll be resolved anytime soon. As a Japanese commentator recently said, “it’s been a bad year for the ‘nuclear village’, but I don’t think they’re down and out yet.” The battle continues.Which of the following may NOT be the advantage of nuclear energy over other energy sources?
| A．Nuclear energy doesn’t produce any greenhouse gases. |
| B．Nuclear energy can help prevent the climate damage. |
| C．Nuclear energy is more environmental-friendly than other green energy sources. |
| D．Nuclear energy can save the consumers some money, compared to other renewable energies. |
What does the underlined word “this ” refer to in paragraph 4?
| A．The fact that many people prefer to use the green energy sources while unwilling to pay higher bill. |
| B．The cost of using renewable sources |
| C．The fact that the nuclear power is cheaper. |
| D．The investment of renewable energy sources |
In the 5th paragraph, the author takes the case of Chernobyl disaster in Ukraine to _______.
| A．convince the reader that nuclear waste is difficult to get rid of. |
| B．explain that nuclear waste may remain harmful to humans for thousands of years. |
| C．persuade the world not to use nuclear energy. |
| D．support the idea that nuclear energy is not safe. |
We can learn from the last paragraph that _______.
| A．the Japanese commentator is positive about the future of nuclear energy. |
| B．the nuclear energy issue will be soon settled. |
| C．a battle will break out in the future. |
| D．Japan is considering to build a nuclear village in the future. |
What is the author's purpose of writing the passage?
| A．To highlight the danger of using nuclear energy. |
| B．To introduce some serious nuclear disasters. |
| C．To show the argument between nuclear supporters and protesters. |
| D．To give some advice on how to use nuclear energy safely. |