【题目】根据短文理解,选择正确答案。
Energy independence. It has a nice ring to it. Doesn't it? If you think so, you're not alone, because energy independence has been the dream of American president for decades, and never more so than in the past few years, when the most recent oil price shock has been partly responsible for kicking off the great recession.
“Energy independence” and its rhetorical (修辞的) companion “energy security” are, however, slippery concepts that are rarely though through. What is it we want independence from, exactly?
Most people would probably say that they want to be independent from imported oil. But there are reasons that we buy all that oil from elsewhere.
The first reason is that we need it to keep our economy running. Yes, there is a trickle(涓涓细流)of biofuel available, and more may become available, but most biofuels cause economic waste and environmental destruction.
Second, Americans have basically decided that they don't really want to produce all their own oil. They value the environmental quality they preserve over their oil imports from abroad. Vast areas of the United States are off-limits(禁止) to oil exploration and production in the name of environmental protection. To what extent are Americans really willing to endure the environmental impacts of domestic energy production in order to cut back imports?
Third, there are benefits to trade. It allows for economic efficiency, and when we buy things from places that have lower production costs than we do, we benefit. And although you don't read about this much, the United States is also a large exporter of oil products, selling about 2 million barrels of petroleum products per day to about 90 countries.
There is no question that the United States imports a great deal of energy and, in fact, relies on that steady flow to maintain its economy. When that flow is interrupted, we feel the pain in short supplies and higher prices, At the same time, we derive(得到,获得) massive economic benefits when we buy the most affordable energy on the world market and when we engage in energy trade around the world.
(1)What does the author say about energy independence for America?
A.It sounds very attractive.
C. It will bring oil prices down.
B.It ensures national security.
D. It has long been everyone's dream.
(2)Why does America rely heavily on oil imports?
A.It wants to expand its storage of crude oil.
B.Its own oil reserves are quickly running out.
C.It wants to keep its own environment intact.
D.Its own oil production falls short of demand.
(3)What is the author's purpose in writing the passage?
A.To arouse Americans' awareness of the energy crisis.
B.To stress the importance of energy conservation.
C.To explain the increase of international oil trade.
D.To justify(证明… 有理的) America's dependence on oil imports.

【题目】根据短文理解,选择正确答案。
Our risk of cancer rises dramatically as we age. So it makes sense that the elderly should be routinely screened for new tumors — or doesn't it?
While such vigilant(警觉的) tracking of cancer is a good thing in general, researchers are increasingly questioning whether all of this testing is necessary for the elderly. With the percentage of people over age 65 expected to nearly double by 2050, it's important to weigh the health benefits of screening against the risks and costs of routine testing.
In many cases, screening can lead to additional biopsies(活检) and surgeries to remove cancer, which can cause side effects, while the cancers themselves may be slow-growing and may not pose serious health problems in patients' remaining years. But the message that everyone must screen for cancer has become so ingrained(根深蒂固的) that when health care experts recommended that women under 50 and over 74 stop screening for breast cancer, it caused a riotous reaction among doctors, patients and advocacy groups.
It's hard to uproot deeply held beliefs about cancer screening with scientific data. Certainly, there are people over age 75 who have had cancers detected by routine screening, and gained several extra years of life because of treatment. And clearly, people over age 75 who have other risk factors for cancer, such as a family history or prior personal experience with the disease, should continue to get screened regularly. But for the remainder, the risk of cancer, while increased at the end of life, must be balanced with other factors like remaining life expectancy(预期寿命).
A recent study suggests that doctors start to make more objective decisions about who will truly benefit from screening—especially considering the explosion of the elderly that will soon swell our population.
It's not an easy calculation to make, but one that make sense for the whole patient. Dr. Otis Brawley said, “Many doctors are ordering these tests purely to cover themselves. We need to think about the rational(合理的) use of health care and stop talking about the rationing of health care.”
That means making some difficult decisions with elderly patients, and going against the misguided belief that when it comes to health care, more is always better.
(1)Why do doctors recommend routine cancer screening for elderly people?
A.It is believed to contribute to long life.
B.It is part of their health care package.
C.The elderly are more sensitive about their health.
D.The elderly are in greater danger of tumor(肿瘤) growth.
(2)How do some researchers now look at routine cancer screening for the elderly?
A.It adds too much to their medical bills.
B.It helps increase their life expectancy.
C.They are doubtful about necessity.
D.They think it does more than good.
(3)What is the conventional view about women screening for breast cancer?
A.It applies to women over 50.
B.It is a must for adult women.
C.It is optional for young women.
D.It doesn't apply to women over 74.
(4)Why do many doctors prescribe routine screening for cancer?
A.They want to protect themselves against medical disputes.
B.They want to take advantage of the medical care system.
C.They want data for medical research.
D.They want their patients to suffer less.

【题目】根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
Stress(压力) is a popular cause of major diseases affecting people worldwide. It is so common that people have begun to search for the best and easiest ways to reduce stress.
Exercise for a better life.
Regular runners say that there is no better feeling than the one you get when you finish your daily run. Exercising is a good way for you to remove stress from your life. And it can also lift your mood. An additional benefit of exercising is that it keeps you fit and healthy!
Organize it.
Keeping your workplace and home organized is also a way for you to avoid stressful situations. Working in a messy(凌乱的) area keeps your brain thinking on several different things at the same time.
Manage your time wisely.
Sticking to(坚持) your schedule gives you focus and a goal to work on. It also helps you avoid missing out on deadlines which are a great source of stress. Managing your time wisely means managing your stress.
In a word, we shouldn't let stress stop us living a normal and healthy life. Stress will naturally appear due to the modern way of life. Don't let stress get the better of you and make you lead an unhappy life.
A. Avoid stressed people.
B. Know what causes your stress.
C. Plan your day ahead and stick to it.
D. Here are some ways to say goodbye to stress.
E. Regular exercise gives you time to think things.
F. And it gets hard to focus on (思想集中) just one thing.
G. But just like fire, if we control stress it can't hurt us.

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