D

　　In the atmosphere,carbon dioxide actd rather like a one-way mirror or the glass in the roof of a greenhouse which allows the sun's rays to enter but prevents the heat from excaping.

　　According to a weather expert's prediction,the atmosphere will be 3 warmer in the year 2050 than it is today, if man continues to burn luels at the present rate. If this warming up took place,the ice caps in the poles would begin to melt,thus raising sea level several meters and severely flooding coastal cities.Also，the increase in atmospheric temperature would lead to great changes in the climate of the northern hemisphere(半球),psooicbly resulting in an alteration of earth's chief food growing zones.

　　In the past,concern about a man - made warming of the earth has concentrated on the Arctic because the Antarctic is much colder and has a much thicker ice sheet.But the weather experts are now paying more attention to West Antarctic,which may be affected by a warming on the scale that will possibly take place in the next fifty years from on burning of fuels.

　　Satellite pictures showthat large areas of Antarctic ice are already disappearing.The evidence available suggests that a warming has taken place.This fits the theory that carbon dioxide warms the earth.

　　However,most of the fuel is burnt in the northern hemisphere,where temperatures seem to be falling.Scientists conclude,therefore,that up to now natural influences on the weather have exceeded those caused by man.The question is:Which natural cause has most effect on the weather?

　　One possibility is the variable behavior of the sun.Astronomers at one research station have studied the hot spots and cold spots(that is,the relatively less hot spots) on the sun. As the sun rotates(旋转),every 27.5 days,it presents hotter or colder faces to the earth,and different aspects to different parts of the earth.This seems to have a considerable effect on the distribution of the earth's atmospheric pressure,and consequently on wind circulation.The sun is also variable over a long term:its heat output goes up and down in cycles,the latest trend being downward.

　　Scientists are now finding mutual relations between models of solar weather interactions and the actual climate over many thousands of years ,including the last Ice Age.The problem is that the models are predicting that the world should be entering a new Ice Age and it is not.

　　One way of solving this theoretical difficulty is to assume a delay of thousands of years while the solar effects overcome the inertia(不活动，惰性) of the earth's climate.If this is right,the warming effect of carbon dioxide might thus be serving as a useful counter balance to the sun's diminishing heat.

　　68.It can be concluded that a concentration of carbon dioxide in the atmosphere would ___.

　　　A.mean a warming - up im the Arctic

　　　B.raise the temperature of the earth's surface

　　　C.prevent the sun's rays from reaching the earth's surface

　　　D.account for great changes in the climate in the northern hemiphere

　　69.Although the fuel consumption is greater in the northern hemisphere,temperatures there seem to be falling.This is _______.

　　　A.mainly because the levels of carbon dioxide are rising

　　　B.partly due to variations in the output of solar energy

　　　C.possibly because the ice caps in the poles are melting

　　　D.exclusively due to the effect of the inertia of the earth's climate

　　70.On the basis of their models,scientists are of the opinion that ________.

　　　A.the climate of the world should be becoming cooler

　　　B.the new Ice Age will be delayed by the greenhouse effect

　　　C.the man - made warming effect helps to increase the solar effects

　　　D.it will take thousands of years for the inertia of the earth's climate to take effect

That“Monday morning feeling”could be a crushing pain in the chest which leaves you sweating and gasping for breath. Recent research from Germany and Italy shows that heart attacks are more common on Monday mornings and doctors blame the stress of returning to work after the weekend break.

　The risk of having a heart attack on any given day should be one in seven, but a six-year study helped by researchers at the Free University of Berlin of more than 2, 600 Germans showed that the average person had a 20 percent higher chance of having a heart attack on a Monday than on any other day.

　Working Germans are particularly not protected against attack, with a 33 percent higher risk at the beginning of the working week. Non-workers, by comparison, appear to be no more at risk on a Monday than any other day.

　A study of 11, 000 Italians proved 8 a. m. on a Monday morning as the most stressful time for the heart, and both studies showed that Sunday is the least stressful day, with fewest heart attacks in both countries.

　The finding could lead to a better understanding of what is the immediate cause of heart attacks, according to Dr Stefan Willich of the Free University. “We know a lot about long-term risk factors such as smoking and cholesterol（胆固醇）but we don’t know what actually causes heart attacks, so we can’t give clear advice on how to prevent them, ”he said.

　Monday mornings have a double helping of stress for the working body as it makes a rapid change from sleep to activity, and from the relaxing weekend to the pressures of work.

　“When people get up, their blood pressure and heart rate go up and there are hormonal（内分泌）changes in their bodies, ”Willich explained. “All these things can have an unfavorable effect in the blood system and increase the risk of a clot（血凝块）which will cause a heart attack.”

　“When people return to work after a weekend off, the pace of their life changes. They have a higher workload, more stress, more anger and more physical activities,”said Willich.

1.Monday morning feeling, as this passage shows, ________.

2.To protect people from a heart attack, doctors have paid much attention to ________.

3.It can be learned from this passage that the heart attack has something to do with all the following EXCEPT ________.

4.If the researchers give us some advice to avoid Monday morning feeling, what might it be?

请认真阅读下列短文，并根据所读内容在文章后表格中的空格里填入一个最恰当的单词。

注意： 每个空格只填1个单词。

There are many destructive (破坏性的) forces when it comes to nature, which have destroyed whole cities and killed many people. They’re really terrible, but they occur somewhat often, and this is why you see so many charities these days which focus their efforts on helping people who have been affected by natural disasters.

While the world is a very beautiful place to live in, there will always be parts of the world where natural disasters happen more often than in other places, where properties and lives are destroyed. Only the people who live in the country where tsunamis and earthquakes as well as other disasters occur experience these, and we can only imagine the suffering that they go through.

For some people out there, the world is cruel, but they have no choice but to stay where they are. A lot of the time people simply cannot afford to move away, as they might not be able to get a job when they leave.

In 2004, there was a tsunami in the Indian Ocean. A tsunami is a large wave that towers hundreds of feet into the air, and covers whole areas when it comes crashing down on to dry land. This particular tsunami was caused by an earthquake that happened in the middle of the sea, shooting the water away from the ground and towards dry land. This tsunami actually reached thirty meters in height, and was one of the worst tidal waves the world has ever seen. Over 200,000 people were hurt in the disaster.

In 2005, we also saw a hurricane happened in the United States. This hurricane was known as hurricane Katrina, and is perhaps the worst in the history of the world. It happened in 2005 and destroyed millions of properties in the area. It also took the lives of nearly 2,000 American people. It was known that for ten days, the wind swept through the area, meaning the most powerful country in the world became helpless in their attempts to save the people who were affected by the hurricane.

Finally, in 2008 we saw yet another natural disaster. This time it was a cyclone (旋风), which is similar to a hurricane but happens in a circular motion (圆周运动). This cyclone Nargis had been one of the strongest to have ever occurred, reaching a death toll of nearly 150,000 people.

All of these were terrible disasters that were unavoidable.

Title: Forces of Nature

In their book Time to Eat the Dog: The Real Guide to Sustainable Living, Robert and Brenda Vale say keeping a medium?sized dog has the same ecological impact as driving 10,000 km a year in a 4.6 liter Land Cruiser.?
“We’re not actually saying it is time to eat the dog. We’ re just saying that we need to think about and know the ecological impact of some of the things we do and that we take for granted.”?
Constructing and driving the jeep for a year requires 0.41 hectares of land, while growing and manufacturing a dog’s food takes about 0.84 hectares — or 1.1 hectares in the case of a large dog such as a German shepherd.?
Convincing flesh?eating cats and dogs to go vegetarian for the sake of the planet is a non?starter, the Vales say. Instead they recommend keeping “greener”, smaller, and more sustainable pets, such as goldfish, chickens or rabbits.?
The book’s playful title, and serious suggestion that pet animals may be usefully “recycled”, by being eaten by their owners or turned into pet food when they die, may not appeal to animal fans.?
Annoying as the idea may be, the question is valid given the planet’s growing population and limited resources, Robert Vale said.?
“Issues about sustainability are increasingly becoming things that are going to require us to make choices which are as difficult as eating your dog. It’s not just about changing your light bulbs or taking a cloth bag to the supermarket,” he said.?
“It’s about much more challenging and difficult issues,” he added. “Once you see where cats and dogs fit in your overall balance of things, you might decide to have the cat but not also to have the two cars and the three bathrooms and be a meat eater yourself.”?
56. The authors gave their book the playful title to________.?
A. make it amusing                    B. create a vivid image?
C. show　writing skills                 D. arouse people’ s concern
57. In Paragraph 3 the writer mainly wants to tell us________.?
A. the amount of consumed land ?
B. the neglected ecological impact?
C. some familiar examples ?
D. some actual figures?
58. What does “sustainability” mean according to the passage??
A. Going vegetarian. ?
B. Raising cats and dogs.?
C. Using a cloth bag. ?
D. Keeping a greener life.?
59. Who may not like the idea of “recycling” pet animals??
A. Manufacturers.                  B. Drivers. ?
C. Animal fans.                     D. The authorities.?
60. What do the authors think of living a sustainable life??
A. Challenging.          B. Inspiring.          C. Inviting.         D. Touching.

任务型阅读 (共10小题；每小题1分，满分10分)

请认真阅读下列短文，并根据所读内容在文章后表格中的空格里填入一个最恰当的单词。注意：每个空格只填1个单词。请将答案写在答题卡上相应题号的横线上。

There are many destructive (破坏性的) forces when it comes to nature, which have destroyed whole cities and killed many people. They’re really terrible, but they occur somewhat often, and this is why you see so many charities these days which focus their efforts on helping people who have been affected by natural disasters.

While the world is a very beautiful place to live in, there will always be parts of the world where natural disasters happen more often than in other places, where properties（财产）and lives are destroyed. Only the people who live in the country where tsunamis and earthquakes as well as other disasters occur experience these, and we can only imagine the suffering that they go through.

For some people out there, the world is cruel, but they have no choice but to stay where they are. A lot of the time people simply cannot afford to move away, as they might not be able to get a job when they leave.

In 2004, there was a tsunami in the Indian Ocean. A tsunami is a large wave that towers hundreds of feet into the air, and covers whole areas when it comes crashing（冲进） down on to dry land. This particular tsunami was caused by an earthquake that happened in the middle of the sea, shooting the water away from the ground and towards dry land. This tsunami actually reached thirty meters in height, and was one of the worst waves the world has ever seen. Over 200,000 people were hurt in the disaster.

In 2005, we also saw a hurricane happened in the United States. This hurricane was known as hurricane Katrina, and is perhaps the worst in the history of the world. It happened in 2005 and destroyed millions of properties in the area. It also took the lives of nearly 2,000 American people. It was known that for ten days, the wind swept through the area, meaning the most powerful country in the world became helpless in their attempts to save the people who were affected by the hurricane.

Finally, in 2008 we saw yet another natural disaster. This time it was a cyclone (旋风), which is similar to a hurricane but happens in a circular motion (圆周运动). This cyclone Nargis had been one of the strongest to have ever occurred, causing the death of nearly 150,000 people. All of these were terrible disasters that were unavoidable.

Title: Forces of Nature