In 2004，the World Health Organization，WHO，warned of a possible outbreak of another serious disease which may be even more deadly than SARS．The WHO believes that it is likely that bird flu will spread to human beings in the next few years．If it does，up to seven millions people could die from the disease．

Diseases like bird flu are caused by viruses，that is，tiny things which change and become more dangerous over time．When a new type of a common virus changes，it may be able to get past the body’s immune(免疫的)system．If that happens，humans are in great danger until a cure or treatment becomes available．

There have always been viruses and people always get sick，of course，but as we saw with SARS，the situation is more difficult today．People travel more than ever before，which means that disease can spread quickly and across large areas——in fact the whole world．

Scientists are already working on drugs that will prevent or limit the effect of a new virus，but the process takes time．It is just as important to make sure that countries，especially poor countries，are prepared to deal with the disease. New disease usually affect poor areas the most，so we must help develop health care in all countries．

The situation is more serious today because           ．

A．people travel more                                      B．people don’t eat healthy food

C．there aren’t enough hospitals                        D．scientists can’t find a cure

From this passage we know           ．

A．bird flu will surely spread to human beings in the next few years．

B．a virus changes and become less dangerous over time．

C．SARS is 1ikely to come again in some years．

D．poor areas usually suffers more from new diseases than rich areas．

The possible title of this passage is

A．The Work of WHO

B．Scientists Are Working Hard on Drugs for Diseases

C．What Is a Virus

D．Virus Changes and Causes New Diseases Over Time

In 1886 explorer Robert Peary traveled to Greenland for the U.S. Navy. Before his journey, no one knew Greenland’s size or shape. On Peary’s first trips, he explored Greenland, mapping parts of it.

   When Peary returned to the United States, he went to a businessman to sell some furs. There he met Matthew Henson, an African American mechanic, builder and navigator. When Peary went to Nicaragua on a Navy mission(任務),Henson went with him. When that job was over, the two headed to the Arctic.

   Henson and Peary set sail for Greenland. When they landed, Henson built a house for their base camp. Peary and his men set out to explore the land by dog sledge(雪橇). Henson was injured and had to stay at the base. While there, he made friends with the Inuit, the native people.

   In 1895 Henson, Peary and Hugh Lee went out on another dog sledge journey. This time, they found Greenland’s northernmost point. They now knew that the North Pole lay under the frozen Arctic Ocean. Peary had hoped to cross the ice. but the group ran out of food and returned to base camp. In the years that followed, Peary and Henson tried several times to reach the North Pole, but each time they failed. On one trip, Peary’s feet froze, and he lost his toes（腳趾）.

   Peary and Henson planned last trip when Peary was 53 years old. They started across the sea ice from Ellesmere Island, which is located（位于） north of Canada. The temperature dropped as low as—51 degrees Celsius. The explores’ cheeks froze , and they suffered snow blindness from the sun’s glare. They experienced high winds and storms, and they also faced a hidden danger. Under the frozen ocean were powerful currents（潮流）. The ice moved and broke apart leaving open water, called leads. Twice Peary fell into leads. But eventually he and Henson became the first persons to reach the North Pole.

What did Peary and Henson find in 1895?

   A. Greenland is near the Artic Ocean.

   B. Ellesmere Island is located north of Canada.

C. The North Pole is located in the Artic Ocean.

D. Greenland’s northernmost point is the North Pole.

Which of the following words can be used to describe Peary?

   A. Determined.  B. Modest.   C. Generous.  D. Honest.

What was the potential danger that Peary and Henson faced on their last trip?

   A. Snow blindness.   B. High winds.   C. Storms.   D. Leads.

The best title for the passage might be “____”.

   A. The mapping of the Arctic Ocean.

   B. Peary and Henson: Arctic explorers

   C. Early explorers’ trips to the South Pole

   D. Henson and Peary: discoverers of Greenland

In a natural disaster—a hurricane,flood,tornado,volcanic eruption,or other calamity—minutes and even seconds of warning can be the difference between life and death.Because of this,scientists and government officials are working to use the latest technological advances to predict when and where disasters will happen.They are also studying how best to analyze and communicate this information once it is obtained.The goal is to put technology to effective use in saving lives and property when nature unleashes its power with devastating results.

On September 29,1998,Hurricane Georges made landfall in Biloxi,Mississippi,after devastating Haiti,the Dominican Republic,Puerto Rico,and several islands of the Caribbean with torrential rains and winds up to 160 km/h （100 mph）.Few people lost their lives along the Gulf Coast of the United States,although hundreds died in the Caribbean.

This was a very different outcome from 1900,when a powerful Gulf Coast hurricane made an unexpected direct hit on Galveston,Texas,killing at least 6 000 people.Vastly improved hurricane warnings explain the different circumstances at either end of the 20th century—residents of Galveston had no advance warning that a storm was approaching,while residents of Biloxi had been warned days in advance of Georges’s approach,allowing for extensive safety precautions.

At the same time that people in Biloxi were thankful for the advance warning,some residents of New Orleans,Louisiana,120 km to the west,were less satisfied.A day before Georges made landfall,forecasters were predicting that the hurricane had a good chance of striking New Orleans.Because much of New Orleans lies below sea level,the city is at risk for flooding.In addition,because New Orleans has a large population in vulnerable locations,emergency management officials must begin evacuations well before a storm strikes.But evacuation costs money:Businesses close,tourists leave,and citizens take precautionary measures.The mayor of New Orleans estimated that his city’s preparations for Georges cost more than 50 million.After the full fury of Georges missed New Orleans,some residents questioned the value of the hurricane forecasts in the face of such high costs.

The differing views on the early warnings for Hurricane Georges illustrate some of the complexities involved in predicting disasters.Disaster prediction is more than just forecasting the future with advanced technology—it is also a process of providing scientific information to the government officials and other decision makers who must respond to those predictions.

In general,the process has three phases.First,there is the challenge of forecasting the event itself.In the case of Georges,scientists worked to predict the future direction and strength of the hurricane days in advance.

A second important challenge is communicating the forecast to decision－makers.Because forecasts are always uncertain,a central factor in disaster predictions is communicating this uncertainty.Uncertainty is usually described in terms of odds or probabilities,much like daily weather forecasts.The media plays an important role in communicating predictions and their uncertainty to the public.

The third part of the process is the use of predictive information by decision makers.Even the most accurate information is of little value if the decision maker does not use it appropriately,for example in deciding whether to order an evacuation.If there is a breakdown in any of these three phases of prediction,the result is increased danger and a higher risk of loss of life.

The underlined word“calamity”refers to ______.

A.nature                       B.thunderstorms            C.disaster                            D.dangers

According the passage,the purpose of disaster prediction is to______.

A.demonstrate the power of advanced technology

B.bring out the truth between life and death

C.prevent such natural disasters from happening

D.reduce human casualties and loss of property

Which of the following areas suffered the most severe damage?

A.Biloxi,Mississippi.                                        B.Gulf Coast of U. S.

C.Galveston,Texas.                                           D.New Orleans.

In 2004，the World Health Organization，WHO，warned of a possible outbreak of another serious disease which may be even more deadly than SARS．The WHO believes that it is likely that bird flu will spread to human beings in the next few years．If it does，up to seven millions people could die from the disease．

Diseases like bird flu are caused by viruses，that is，tiny things which change and become more dangerous over time．When a new type of a common virus changes，it may be able to get past the body’s immune(免疫的)system．If that happens，humans are in great danger until a cure or treatment becomes available．

There have always been viruses and people always get sick，of course，but as we saw with SARS，the situation is more difficult today．People travel more than ever before，which means that disease can spread quickly and across large areas——in fact the whole world．

Scientists are already working on drugs that will prevent or limit the effect of a new virus，but the process takes time．It is just as important to make sure that countries，especially poor countries，are prepared to deal with the disease. New disease usually affect poor areas the most，so we must help develop health care in all countries．

The situation is more serious today because           ．

A．people travel more                                      B．people don’t eat healthy food

C．there aren’t enough hospitals                        D．scientists can’t find a cure

From this passage we know           ．

A．bird flu will surely spread to human beings in the next few years．

B．a virus changes and become less dangerous over time．

C．SARS is 1ikely to come again in some years．

D．poor areas usually suffers more from new diseases than rich areas．

The possible title of this passage is

A．The Work of WHO

B．Scientists Are Working Hard on Drugs for Diseases

C．What Is a Virus

D．Virus Changes and Causes New Diseases Over Time

In February 2006, Lydia Angyiou and her two sons were walking through their village in northern Canada．The sound of children shouting made her turn around．To her horror, Lydia saw  a 700-pound polar bear behind her eyeing her seven-year-old son．Getting between the bear and her child, Lydia yelled at the children to run away．She then began hitting and kicking the animal as hard as she could．A neighbor who heard all the noise came and shot the bear．But everyone agreed it was Lydia who had saved her children's lives．A local policeman described it this way: “…I guess when your back is up against the wall…we come up with super-human strength．”

Where does this “super-human strength”，courage and quick thinking come from? Experts say it comes from stress! In stressful situations, the body releases chemicals that prepare it to take action．These chemicals give people the speed and strength they need to fight danger or run away from it．

When we think of stress, we usually think of its negative effects．Studies, though, show that moderate levels of stress are actually helpful．In fact, the way we perform is usually affected by the amount of stress we feel．

Stress causes the brain to release adrenaline（腎上腺素）which in turn increases our energy and excitement．The chemical gives us clearer minds and helps us to do more．This is why some people say they work better under a deadline．

Adrenaline that is not released for long periods of time can cause us to increase and strengthen our abilities instead of weakening them．We sometimes turn out our very best work when we push ourselves to the limit．Stress can also make us more confident．Handling small amounts of stress now prepares us for handling serious situations in the future．Who knows? Today's stress may even prepare for the next polar bear that comes along!

In the first paragraph, the case of Lydia Angyiou is mentioned to ______．

       A．introduce the topic to be followed

       B．praise Lydia Angyiou for her bravery

       C．remind us of the unexpected danger of life

       D．show the importance of super-human strength

What does the policeman probably mean by saying "your back is up against the wall"?

       A．You are helped．            B．You are inspired．

       C．You are confident．    D．You are cornered．

What would be the best title for the passage?

       A．Brave Mother           B．The Cause of Stress

C．The Benefit of Stress   D．Super-human Strength