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Animal's “Sixth Sense”
A tsunami（海啸）was triggered（引发）by an earthquake in the Indian Ocean in December, 2004.It killed tens of thousands of people in Asia and East Africa. Wild animals,1， seem to have escaped that terrible tsunami. This phenomenon adds weight to notions that they possess a“sixth sense” for2 ,experts said.
Sri Lankan wildlife officials have said the giant waves that killed over 24,000 people along the Indian Ocean island's coast clearly 3 wild beasts,with no dead animals found.
“No elephants are dead,not4a dead rabbit. I think animals can5 disaster.
They have a sixth sense. They know when things are happening,”H.D. Ratnayake,deputy director of Sri Lanka's Wildlife Department,said about one month after the tsunami attack. The6washed floodwaters up to 2 miles inland at Yala National Park in the ravaged（被 毁坏的）southeast, Sri Lanka's biggest wildlife7and home to hundreds of wild elephants and several leopards（豹）.
“There has been a lot of8 evidence about dogs barking or birds migrating before volcanic eruptions（火山爆发）or earthquakes. But it has not been proven ,” said Matthew van Lierop,an animal behavior 9 at Johannesburg Zoo.
“There have been no10studies because you can't really test it in a lab or field setting , ” he told Reuters. Other authorities concurred（同意）with this11.
“Wildlife seem to be able to pick up certain12 ,especially birds…there are many re- ports of birds detecting impending（迫近的）disasters , ” said Clive Walker , who has written several books on African wildlife.
Animals13 rely on the known senses such as smell or hearing to avoid danger such as predators（食肉动物）.
The notion of an animal “sixth sense”一or14other mythical power一is an enduring one which the evidence on Sri Lanka's ravaged coast is likely to add15.
5._________
A: feel
B: see
C: hear
D: sense

With immense relief I stopped running.
A:no
B:little
C:scarce
D:enormous

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Climate Change:The Long Reach
1.Earth is warming.Sea levels are rising.There's more carbon in the air,and Arctic ice is melting faster than at any time in recorded history.Scientists who study the environment to better gauge（评估） Earth's future climate now argue that these changes may not reverse for a very long time.
2.People burn fossil fuels like coal and oil for energy.That burning releases carbon dioxide,a colorless gas.In the air,this gas traps heat at Earth's surface.And the more carbon dioxide released,the more the planet warms.If current consumption of fossil fuels doesn't slow,the long-term climate impacts could last thousands of years-and be more severe than scientists had been expecting.Climatologist Richard
Zeebe of the University of Hawaii at Manoa offers this conclusion in a new paper.
3.Most climate-change studies look at what's going to happen in the next century or so.During that time, changes in the planet' s environment could nudge（推动）global warming even higher.For example, snow and ice reflect sunlight back into space.But as these melt,sunlight can now reach-and warm-the exposed ground.This extra heat raises the air temperature even more,causing even more snow to melt.This type of rapid exaggeration of impacts is called a"fast feedback".
4.Zeebe says it's important to look at fast feedbacks.However,he adds,they're limited.From a climate change perspective,"This century is the most important time for the next few generations,"he told Science News."But the world is not ending in 2100."For this new study,Zeebe now focuses on"slow feedbacks".While fast feedback events unfold over decades or centuries,slow feedbacks can take thousands of years.Melting of continental ice sheets and the migration of plant life-as they relocate to more comfortable areas-are two examples of slow feedbacks.
5.Zeebe gathered information from previously published studies investigating how such processes played out over thousands of years during past dramatic changes in climate.Then he came up with a forecast for the future that accounts for both slow and fast feedback processes.Climate forecasts that use only fast feedbacks predict a 4.5 degree Celsius(8.1 degree Fahrenheit)change by the year 3000.But slow feedbacks added another 1.5℃-for a 6℃ total increase,Zeebe reports.He also found that slow feedback events will cause global warming to persist for thousands of years after people run out of fossil fuels to burn.
Paragraph 2______
A:Rising of Sea Levels
B:Impact of Burning Fossil Fuels
C:Fast Feedbacks
D:Slow Feedbacks
E:Unpredictability of Feedback Processes
F:A Prediction of Future Climate Change

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The Northern Lights
The Sun is stormy and has its own kind of weather It is so hot and active that even the Sun's gravity cannot hold its atmosphere in check!Energy flows away from the Sun toward the Earth in a stream of electrified particles that move at speeds around a million miles per hour. These particles are called plasma,and the stream of plasma coming from the Sun is called the solar wind. The more active the Sun,the stronger the solar wind.
The solar wind constantly streams toward the Earth,but don't worry because a protective magnetic field surrounds our planet.The same magnetic field that makes your compass point north also steers the particles from the Sun to the north and south poles.The charged particles become trapped in magnetic belts around the Earth. When a large blast of solar wind crashes into the Earth's magnetic field,the magnetic field first gets squeezed and then the magnetic field lines break and reconnect.
The breaking and reconnecting of the magnetic field lines can cause atomic particles called electrons trapped in the belts to fall into the Earth's atmosphere at the poles. As the electrons fall to the Earth,they collide with gas molecules in the atmosphere,creating flashes of light in the sky. Each atmospheric gas glows a different color. Oxygen and nitrogen glows red and green and nitrogen glows violet-purple. As these various colors glow and dance in the night sky,they create the Northern Lights and the Southern Lights.
Watching auroras is fun and exciting,but normally you can only see them in places far north like Alaska and Canada. The movement of the aurora across the sky is usually slow enough to easily follow with your eyes but they can also pulsate,flicker,or even move like waves.During solar maximum,auroras are seen as far south as Florida,even Mexico!
Auroras often seem to be very close to the ground,but the lowest aurora is still about 100 kilometers above the ground,a distance much higher than clouds are formed or airplanes can fly. A typical aurora band can be thousands of kilometers long,a few hundred kilometers high,but only a few hundred meters thick.
We hope you are able to travel to far north places like the Arctic Circle and see the Northern Lights at least once during your lifetime. We know you will never forget it!
The Earth is quite safe with a magnetic field surrounding it to protect it from the attack by the solar wind.
A: Right
B: Wrong
C: Not mentioned

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Mt. Desert Island
The coast of the State of Maine is one of the most irregular in the world.A straight line running from the
southernmost coastal city to the northernmost coastal city would measure about 225 miles.If you followed the
coastline between these points,you would travel more than ten times as far. This irregularity is the result of
what is called a drowned coastline._________(46)At that time,the whole area that is now Maine was part
of a mountain range that towered above the sea. As the glacier（冰川）descended , however , it expended
enormous force on those mountains,and they sank into the sea.
As the mountains sank,ocean water charged over the lowest parts of the remaining land,forming a series
of twisting inlets and lagoons（咸水湖）.The highest parts of the former mountain range , nearest the shore,
remained as islands.________(47)Maine fossils found here were 225 feet above sea level,indicating the
level of the shoreline prior to the glacier.
The 2,500-mile-long rocky coastline of Maine keeps watch over nearly two thousand islands. Many of
these islands are tiny and uninhabited,but many are home to thriving communities.Mt. Desert Island is one
of the largest,most beautiful of the Maine coast islands.Measuring 16 miles by 12 miles,Mt. Desert was es-
sentially formed as two distinct islands._______(48)
For years,Mt. Desert Island,particularly its major settlement,Bar Harbor,afforded summer homes for the
wealthy.Recently though,Bar Harbor has become a rapidly growing arts community as well.But,the best part
of the island is the unspoiled forest land known as Acadia National Park.Because the island sits on the
boundary line between the temperate（温带）and sub-Arctic zones,the island supports the plants and ani-
mals of both zones as well as beach , inland , and alpine（高山的）plants. _________( 49 ) The establish-
ment of Acadia National Park in 1916 means that this natural reserve will be perpetually available to all
people,not just the wealthy.Visitors to Acadia may receive nature instruction from the park naturalists as well
as enjoy camping,cycling,and boating.Or they may choose to spend time at the archeological museum,
learning about the Stone Age inhabitants of the island.
The best view on Mt.Desert Island is from the top of Cadillac Mountain._________(50)From the
summit,you can gaze back toward the mainland or out over the Atlantic Ocean and contemplate the beauty
created by a retreating glacier.
_________（49）
A:This mountain rises 1,532 feet,making it the highest mountain on the Atlantic seaboard.
B:It is split almost in half by Somes Sound,a deep and narrow stretch of water,seven miles long.
C:It also lies in a major bird migration lane and is a resting spot for many birds.
D:The term comes from the activity of the ice age.
E:Mt.Desert Island is one of the most famous of all the islands left behind by the glacier.
F: The wealthy residents of Mt.Desert Island selfishly kept it to themselves.

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StopSpam
When I first got an e-mail account ten years ago,I received communications only from family,friends,and colleagues.______(46)If we want e-mail to continue to be useful,we need specific laws that make spamming（发送垃圾邮件）a crime.
If lawmakers do not do something soon to prohibit spam,the problem will certainly get much worse.______(47)As more and more advertisers turn to spam to sell their products,individual （个人的）e-mail boxes are often flooded with spam e-mails. Would people continue to use e-mail if they had to deal with an annoying amount of spam each time?
______(48)Many spam e-mails contain computer viruses that can shut down the entire network of a company.Companies rely on e-mail for their employees to communicate with each other. Spam frequently causes failures in their local communications networks.______(49)
Such a situation results in a loss of productivity and requires companies to repeatedly repair their networks.These computer problems raise production costs of companies,which are,in the end, passes on to the consumer.
For these reasons , I believe that lawmakers need to legislate（立法）against spam.
______(50)E-mail is a tool which helps people all over the world to communicate,but spam is destroying this convenience.
______(48)
A: Computer programs allow spammers to send hundreds of millions of e-mails almost instantly.
B: This question is troubling for individuals and companies as well.
C: But now it seems that every time I check my e-mail,I have an endless series of advertisements and other correspondence that do not interest me at all.
D: Spammers should be fined,and perhaps sent to prison if they continue to disturb people.
E: And their employees are thus unable to communicate effectively.
F: Spamming is more serious in China than in America.