One of the most widely accepted, commonly repeated assumptions (假设) in our culture is that if you exercise, you will lose weight. I exercise all the time, but I still have got fat that hangs over my belt when I sit. Why isn’t all the exercise getting rid of it?
It’s a question many of us could ask. More than 45 million Americans now belong to a health club, up from 23 million in 1993. We spend some $19 billion a year on gym memberships. Of course, some people join and never go. Still, as one major study — the Minnesota Heart Survey — found, more of us at least say we exercise regularly.
And yet obesity (肥胖) figures have risen sharply in the same period: a third of Americans are obese, and another third count as overweight by the Federal Government’s definition. Yes, it’s entirely possible that those of us who regularly go to the gym would weigh even more if we exercised less. But like many other people, I get hungry after I exercise, so I often eat more on the days I work out than on the days I don’t. Could exercise actually be keeping me from losing weight?
The popular belief that exercise is essential for weight control is actually fairly new. As recently as the 1960s, doctors routinely advised against too much exercise, particularly for older adults who could injure
themselves. Today doctors encourage even their oldest patients to exercise, which is sound advice for many reasons: People who regularly exercise are at significantly lower risk for all manner of diseases — those of the heart in particular. They less often develop cancer and many other illnesses. But the past few years of obesity research show that the role of exercise in weight loss has been wildly over-evaluated.
“In general, for weight loss, exercise is pretty useless,” says Eric Ravussin, exercise researcher at Louisiana State University. Many recent studies have found that exercise isn’t as important in helping people lose weight as you hear so regularly in gym advertisements or on shows like The Biggest Loser — or from magazines like this one. From the passage we learn that ____.
| A．some Americans join a health club but never go there |
| B．the number of overweight people has doubled since 1993 |
| C．more than 45 million Americans now go to the gym regularly |
| D．Americans waste too much money each year on sports |
According to the passage, exercise ____.
| A．has long been believed to be good for older adults |
| B．is not properly advertised as an effective way to lose weight |
| C．was first recognized as an effective way to lose weight in the 1960s |
| D．is less effective in preventing heart disease than what doctors believe |
According to the writer, people might gain weight because ____.
| A．they have the habit of going to the gym regularly |
| B．they eat the same food when they do not exercise |
| C．they exercise less than required by doctors |
| D．they eat more after they exercise |
What may be the best title for this passage?
| A．Overweight Is Not Good for Your Health |
| B．Exercise Won’t Make You Thin |
| C．Gym Is Part of American Lifestyle |
D．Obesity Is a Social Problem in America |
If English is not your first language, it is a good idea to take English language classes to improve your written and spoken communication skills. There are many ways to learn English. You can learn from a book, a DVD, on the Internet or by attending classes. One of the most successful ways to improve your English is to join a course in a country where English is widely spoken. The more you practice, the more you will learn. But why learn the English language? English is an important language for anyone who is planning to travel or become involved in business.
Many people love travelling, but if their English is poor, it can be difficult to understand signs, read directions and make themselves understood. Before travelling, it is important to understand the culture and customs of the places you visit. Learning basic English before you travel will help you to understand these customs and avoid mistakes that could be embarrassing. When you are travelling, you will also enjoy meeting new people. If you can speak English, you will have a better chance of being able to communicate with the people you meet. Many of your new friends will speak English and others will have English as a second language. Without English, your friendships will be limited as you travel around the world.
If you are involved in business, it is important to be able to communicate in English. The Internet, world travel and modern communication systems have made the world seem like a much smaller place. These days business people interact with customers and other business people from all over the world. That makes your English language skills more important than ever. There are many English language courses that major in business communications. Improving your English skills is one of the best things you could ever do to increase your chances of business success. What kind of people is English important to according to the passage?
| A．Travelers. | B．Teachers. | C．Students. | D．Language experts. |
Which of the following is the best way to learn English well?
| A．Travelling around the world with English-speakers. |
| B．Taking a course in an English-speaking country. |
| C．Learning from all kinds of books or DVDs. |
| D．Learning on the Internet by yourselves. |
According to the passage, which of the following is NOT the aim of learning basic English?
| A．To research the causes of cultural differences. |
| B．To understand the customs of your destination. |
| C．To avoid embarrassing mistakes on your journey. |
| D．To have more opportunities to communicate with others. |
What is the main idea of the third paragraph?
| A．The more you practice, the more you will learn. |
| B．Doing business helps to improve your communication skills. |
| C．English is important for anyone who is involved in business. |
| D．The Internet has made the world become smaller and smaller. |
We can infer from the passage that _____.
| A．learning English well will make you achieve goals more easily |
| B．learning English only aims at achieving business success |
| C．without learning English, your friendships will be limited wherever you are |
| D．you needn’t learn English if you don’t want to travel |
A 34-year-old mother has spoken of how she woke up thinking she was 15 years old and living in 1992.
Naomi Jacobs, from Manchester, was convinced she was still a teenager. In her mind, John Major was Prime Minister and George Bush Sr. was running the White House. She also showed how she screamed when a boy appeared and called her “Mum”. Mobile phones and e-mails were puzzling and Google, Facebook and YouTube sounded like made-up words, she said.
Ms. Jacobs, who had no memory of the years, was told by doctors that she had Transient Global Amnesia (TGA). She has now written a book about the experience which happened in 2008.
“I fell asleep in 1992 as a brave, very confident know-it-all-15-year-old, and woke up as a 32-year-old single mum living in a rented house,” Ms. Jacobs said. “The last thing I remember was falling asleep in my bed, dreaming about a boy in my class. When I woke up, I looked in the mirror and had the fright of my life when I saw an old woman with wrinkles staring back at me. Then a little boy appeared and started calling me Mum. That’s when I started to scream. I didn’t know who he was. I didn’t think he was much younger than I was, and I certainly didn’t remember giving birth to him. I began sobbing uncontrollably. I just wanted my mum. I couldn’t get my head around going to bed one night and waking up in a different century.”
TGA is a rare type of amnesia which can occur suddenly, affecting around three people per 100,000 each year. Fortunately, permanent memory loss is rare. Ms. Jacobs’ memory started to return after eight weeks.
Some people who often suffer from migraines (偏头痛) also appear to be more likely to have TGA. The cause of TGA is unknown. Some think that it may be caused by a temporary cut of blood flow to parts of the brain involved in memory. When a little boy came to call her “Mum”, Naomi Jacobs was _____.
| A．excited | B．frightened | C．worried | D．embarrassed |
What was the last thing Naomi Jacobs could remember?
| A．She was a brave and confident girl. |
| B．She met an old woman with wrinkles. |
| C．George Bush Sr. was elected President. |
| D．She fell asleep dreaming of a boy in her class. |
According to the text, TGA _____.
| A．is quite common |
| B．is caused by brain injuries |
| C．results in permanent memory loss |
| D．causes people to lose part of their memory |
What’s the main idea of the text?
A. Naomi Jacobs has a poor memory.
B. Naomi Jacobs gets an amazing career after TGA.
C. Naomi Jacobs wakes up with the memory of her youth.
D. Naomi Jacobs succeeds in overcoming the disease.According to the passage, we know _______.
| A．Ms. Jacobs’ memory returned to normal now |
| B．Ms. Jacobs often doesn’t remember things |
| C．Ms. Jacobs has not got married yet |
| D．Ms. Jacobs is very young now in deed |
Have you dreamed of building your own machine? Do you wish you could invent something new? Here we look at a few British inventions of recent times.
Adaptable glasses
Do you wear glasses? If so, can you imagine life without them? In 1985, Joshua Silver, a professor at Oxford University, asked himself, “Can I invent a pair of glasses that could be changed by the wearer?” He designed two plastic lenses（透镜）that are filled with a special liquid. Using syringes（注射器）you change the liquid between the lenses until you can see clearly. The glasses are not beautiful but they are easy to use and cheap to make.
The wind-up radio
When you switch your TV on tonight, think about all those people without electricity. Thinking about this, Trevor Baylis came up with the idea of designing a radio that could be powered by hand. In common with Joshua Silver he wanted his invention to be cheap and easy to use. He wanted even the poorest people in developing countries, who don’t have electricity and cannot afford batteries, to use it. The radio has a generator (发电机) which is powered by turning a handle. In 1996 it won a BBC Design Award for Best Protect and Best Design.
The Dyson cleaner
In many homes around the world you can see a cleaner that looks like a spaceship. This is the Dyson vacuum (真空) cleaner which uses something called “cyclonic separation” to separate the dirt. You do not need a bag for your cleaner and it does not get blocked so it is very practical. The idea came to Sir James Dyson after he kept having problems with his vacuum cleaner. He decided he could design a better one and in 1993 he opened his own factory. The Dyson is now one of the best-selling cleaners in the UK and Dyson is believed to have earned over a billion pounds.
The Zapata fly-board
Ever dreamed of zooming through the water and leaping in the air like a dolphin? Now you can thanks to a fly-board, built by water sports enthusiast Frank Zapata. With it you can dive back in the water and out again. It’s possible to jump to incredible heights out of the water — over 30 feet. The basic fly-board model comes in at ￡4,200.
So keep dreaming and inventing. One day you might get it right. What can we learn about Adaptable glasses?
| A．They are very expensive. | B．The inventor is a student. |
| C．The glasses are fragile. | D．They don’t look very nice. |
Which invention won an award?
| A．Adaptable glasses. | B．The wind-up radio. |
| C．The Dyson cleaner. | D．The Zapata fly-board. |
The Dyson cleaner was invented with the purpose of _________.
| A．helping people use cleaners more easily |
| B．making Dyson a rich businessman |
| C．keeping the house cleaner than before |
| D．taking the place of human cleaners |
Cutting global warming pollution would not only make the planet healthier, it would make people healthier too, new research suggests.
Cutting carbon dioxide emissions could save millions of lives, mostly by reducing preventable deaths from heart and lung diseases, according to studies released Wednesday and published in a special issue of The Lancet British medical journal.
“Relying on fossil fuels leads to unhealthy lifestyles, increasing our chances for getting sick and in some cases takes years from our lives,” US Health and Human Services Secretary Kathleen Sebelius said in a telecast (电视广播) briefing from her home state of Kansas. “As greenhouse gas emissions go down, so do deaths from cardiovascular (心血管的) and respiratory diseases (呼吸疾病). This is not a small effect.”
Instead of looking at the health ills caused by future global warming, as past studies have done, this research looks at the immediate benefits of doing something about the problem, said Linda Birnbaum, director of the US National Institute of Environmental Health Sciences.
Some possible benefits seemed highly speculative (投机的，推测的), the researchers conceded (承认，给予), based on people driving less and walking and cycling more. Other proposals studied were more concrete and achievable, such as reducing cook stoves that burn dung (粪便), charcoal and other polluting fuels in the developing world.
And cutting carbon dioxide emissions also makes the air cleaner, reducing lung damage for millions of people, doctors said.
“Here are ways you can attack major health problems at the same time as dealing with climate change," said lead author Dr. Paul Wilkinson, an environmental epidemiologist at the London School of Hygiene and Tropical Medicine.
Wilkinson said the individual studies came up with numbers of premature deaths prevented or extra years of life added for certain places.
For example, switching to low-polluting cars in London and Delhi, India, would save 160 lost years of life in London and nearly 1,700 in Delhi for every million residents, one study found. But if people also drove less and walked or biked more, those extra saved years would soar (高耸，高涨) to more than 7,300 years in London and 12,500 years in Delhi because of less heart disease.What does the passage mainly about?
| A．How can people live longer. |
| B．Cutting carbon dioxide emissions saves life. |
| C．Global warming threatens people’s lives |
| D．People should stop relying on fossil fuels |
The new research differs from past studies in that ________.
| A．it focuses on the immediate benefits of cutting carbon dioxide emissions |
| B．it studies the bad effects arising from future global warming |
| C．it is believed by most people |
| D．it mainly targets at developing countries |
According to Kathleen Sebelius ________.
| A．sometimes it takes years to see the bad effects caused by consuming fossil fuels |
| B．without greenhouse gas emissions, people would not die of cardiovascular and respiratory diseases |
| C．the main reason why people get sick is that they rely on fossil fuels |
| D．death from cardiovascular and respiratory diseases are closely related to greenhouse gas emissions |
It can be inferred from the passage that ________.
| A．London and Delhi have already benefited from reducing greenhouse gas emissions |
| B．switching to low-polluting cars would save 160 lives in London every year |
| C．walking and biking instead of driving will reduce the chance of heart disease |
| D．attacking health problems and dealing with climate change are contradictory |
In an ideal world, people would not test medicines on animals. Such experiments are stressful and sometimes painful for animals, and expensive and time–consuming for people. Yet animal experimentation is still needed to help bridge vast gaps in medical knowledge. That is why there are some 50 to 100 million animals used in research around the world each year.
Europe, on the whole, has the world’s most restrictive laws on animal experiments. Even so, its scientists use some 12 million animals a year, most of them mice and rats, for medical research. Official statistics show that just 1.1 million animals are used in research in America each year. But that is misleading. The American authorities do not think mice and rats are worth counting and, as these are the most common laboratory animals, the true figure is much higher. Japan and China have even less comprehensive data than America.
Now Europe is reforming the rules governing animal experiments by restricting the number of animals used in labs. Alternatives to animal testing, such as using human tissue or computer models, are now strongly recommended. In addition, sharing all research results freely should help to reduce the number of animals for scientific use. At present, scientists often share only the results of successful experiments. If their findings do not fit the hypothesis being tested, the work never sees the light of day. This practice means wasting time, money, and animals’ lives in endlessly repeating the failed experiments.
Animal experimentation has taught humanity a great deal and saved countless lives. It needs to continue, even if that means animals sometimes suffer. Europe’s new measures should eventually both reduce the number of animals used in experiments and improve the way in which scientific research is conducted. What is the main idea of this passage?
| A．The success of animal experiments should be ensured. |
| B．A ban on the use of animals in the lab should be enforced. |
| C．Greater efforts need to be taken to reduce the number of lab animals. |
| D．Scientists should be required to share their research results with each other. |
Which of the following statements is true about animals used in the lab?
| A．America uses only about 1.1 million lab animals per year. |
| B．Europe does not use mice and rats as lab animals at all. |
| C．Britain does not use as many lab animals as China does. |
| D．Japan has less comprehensive data on the number of lab animals used each year. |
Which of the following is mentioned as an alternative to replace animal experiments?
| A．Statistical studies. |
| B．Computer models. |
| C．DNA planted in animals. |
| D．Tissue from dead animals. |
What usually happens to unsuccessful animal experiments?
| A．They are not revealed to the public. |
| B．They are made into teaching materials. |
| C．They are collected for future publication. |
| D．They are not removed from the research topic list. |