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People and the sources of air pollution are found in the same places. This means that cities with large populations have the biggest problem of dirty air. Air pollution is caused by many different things. A major source of air pollution is the gas fumes from cars. Statistics show that 93 percent of all auto trips are within cities. Another major source of dirty air is the burning of coal and oil for energy. This energy is needed to make electricity. Of course, much more electricity is used in the city than in the country.
On the average, we throw away more trash and garbage than the year before. The burning of garbage contributes to air pollution. Many major industries are also responsible for the dirty air in the around cities. The fumes from iron, steel, chemical, and petroleum production add particles to the air.
The effects of air pollution range from mild headaches to death. The levels of pollution found in heavy for traffic may cause headaches for loss of clear vision. Wherever coal and oil are used for fuel, fumes may kill trees and plants and cause metal to corrode. In some of the larger cities, these fumes endanger the live of human beings by contributing to lung diseases and causing early death.
【小題1】The key point of the passage is that _________.

Many years ago in a small village, an old man was hired to clear the spring (泉水) up on the mountain. He patrolled (巡邏) the spring every day, and swept away all the leaves and other things that would dirty the fresh flow of water. Soon, beautiful swans (天鵝) came to the clear spring, and the village became a popular attraction for visitors.
Years passed. One evening the town leaders held a meeting. As they looked at the salary list, one of them said, “Why do we keep this old man on year after year? I don’t think we need him or his work.” Later, the old man was asked to leave.
For several weeks, nothing changed. By early autumn, the leaves began to fall off the trees, and the spring was covered with leaves. A few days later, the water was much darker. Only a few months after the old man left, all the swans left, as did the tourists. Disease reached deeply into the village.
Quickly, the leaders held a special meeting. Realizing their mistake, they rehired the old man. Then within a few weeks, the spring began to clear up. Soon new life returned to the village.
So, my friends, do you see? No matter how small your work or your life seems to be, never overlook it. Anything we can do will make a difference.
【小題1】The leaders decided to ask the old man to leave because they thought ______.

Sharks are among the oldest animals on Earth. There are hundreds of kinds of sharks. Most are about two meters long. The dogfish shark, however, is less than twenty centimeters in length. A shark has an extremely good sense of smell. It can find small amounts of matters in water, such as blood, body liquids and chemicals produced by animals. These powerful senses help sharks find their food. Sharks eat fish, other sharks, and plants that live in the ocean.
Sharks grow slowly. About forty percent of all sharks lay eggs. The others give birth to live young. Some sharks carry their young inside their bodies as humans do. Some sharks are not able to reproduce until they are twenty years old. Most reproduce only every two years. And they give birth to fewer than ten young sharks. For this reason, over-fishing of sharks is of special danger to the future of the animal.
Sharks are important for the world’s oceans. They eat injured and diseased fish. Their hunting activities mean that the numbers of other fish in ocean waters do not become too large. This protects the plants and other forms of life that exist in the oceans.
People hunt sharks for sport, food, medicine and their skin. Experts say the international market for some kinds of sharks has increased because many parts of a shark are valuable. Collectors pay thousands of dollars for the jaws of a shark. Shark liver oil is a popular source of Vitamin A. The skin of a shark can be used like leather.
In Asia, people enjoy a kind of soup made from shark fins. Experts say a fisherman can earn a lot of money for even one kilogram of shark fins. Sharks are among the oldest animals on Earth, but some sharks are in danger of disappearing from Earth. If too many sharks in one area are killed, that group of sharks may never return to normal population levels.
【小題1】Which of the following words best describes the situation sharks are in?

Ever wonder how much a cloud weighs? What about a hurricane? A meteorologist has done some estimates and the results might surprise you.
Let's start with a very simple white puffy cloud — a cumulus cloud（積云）. How much does the water in a cumulus cloud weigh? Peggy LeMone, senior scientist at the National Center for Atmospheric Research in Boulder, Colorado, did the numbers. "The water in the little cloud weighs about 550 tons," she calculates. "Or if you want to convert it to something that might be a little more meaningful … think of elephants."
The thought of a hundred elephants-worth of water suspended in the sky begs another question — what keeps it up there?
"First of all, the water isn't in elephant sized particles（微粒）, it's in tiny tiny tiny particles," explains LeMone. And those particles float on the warmer air that's rising below. But still, the concept of so much water floating in the sky was surprising even to a meteorologist like LeMone. "I had no idea how much a cloud would weigh, actually, when I started the calculations," she says.
So how many elephant units of water are inside a big storm cloud—10 times bigger all the way around than the "puffy" cumulus cloud? Again, LeMone did the numbers: About 200,000 elephants.
Now, ratchet up the calculations for a hurricane about the size of Missouri and the figures get really massive. "What we're doing is weighing the water in one cubic meter theoretically pulled from a cloud and then multiplying by the number of meters in a whole hurricane," she explains.
The result? Forty million elephants. That means the water in one hurricane weighs more than all the elephants on the planet. Perhaps even more than all the elephants that have ever lived on the planet.
【小題1】The weight of      is NOT mentioned in the passage.

閱讀下面短文并回答問題，然后將答案寫到答題卡相應(yīng)的位置(請注意問題后的詞數(shù)要求)。
【1】Who says you need super power to save the world? On April 22, more than a billion people worldwide celebrated Earth Day by taking part in green activities in their communities. However, you needn’t wait until Earth Day. You needn’t be an adult, either! Every day, young people across the globe are doing their part to keep the Earth healthy and green. These are just a few kid heroes for the planet.
Manatee (海牛) minder
【2】When she was in second grade, Stephanie Cohen read about a baby manatee hit by a boat off the coast of Florida. Biologists saved the manatee. But caring for the sea creature was expensive. Stephanie took up a collection and raised 27 dollars in one day. Now 18, Stephanie still raises money to help these "Gentle Giants".
Goodbye paper bags
【3】When Adrienne Smith, 15, was in sixth grade, she noticed that many of her classmates carried paper lunch bags. To help kid cut down on waste, she invented an eco-friendly lunch bag. It is partly made from recycled plastic bottles. "Kids like it because they can fold it up and put it in their backpacks," said Adrienne. She sells the bags at greenearbag.com. And some of the money goes to charity.
He's skiing to save the earth
【4】Parker Liantaud, 15, wanted to raise awareness about the effects of climate change on the polar regions. He set out to become one of the youngest people ever to ski the North Pole. Although the cruel conditions forced Parker and his guide to finish the last 15 miles of the journey by helicopter, Parker felt he met his goal to inspire others. "All young people have the power to make a change," he said.
He ______ the earth
【5】Every year, Max Kesselman, from Pennsylvania, USA, celebrates his birthday December 3 by cleaning up the Earth. When Max was 6, he noticed trash on the sides of the road. He wrote a letter to local leaders suggesting a cleanup day on his birthday.(words:353)
【小題1】What is the main idea of the passage? （no more than 8 words）
【小題2】What does the word "it" (Line 3, Paragraph3) probably refer to? （no more than 5 words ）
【小題3】Fill in the blanks of the title of Paragraph 5 with proper words． （no more than 5 words）
【小題4】Why didn't Parker ski the North Pole all the way?（No more than 7 words）
【小題5】Write out  at least one other Green Activity you can take part in?（no more than 8 words）

Tired of living in the same location but don’t want to leave the house you love? That wouldn’t be a problem if architect Felipe Campolina had his way.
The Brazilian architect has designed a concept for a home tower consisting of portable, stackable (可疊起堆放的) apartment units, which he says opens up new possibilities for ways of living in the city.
His design would allow owners to take their home with them when they travel — whether for a weekend away or for longer periods, he said.
The mobile home tower project is at the concept stage, and it could be years before it is built, if ever at all.
But if it is realized, it would offer an eco-friendly solution to living in urban areas, Campolina said.
“We have enough technology to build with fewer materials and minimize (使減至最小) the impact on nature,” he said.
His vision would call for units with a green roof and walls and a system for recycling water.
The tower, whose first floor would be built nine meters above ground, would also make it possible to save space in thickly populated areas.
“It is designed to facilitate (使便利) its application in dense urban centers, where space is very limited,” he said.
Still just a concept, Campolina — who designed the building for architecture journal eVolo’s Skyscraper Competition — said with enough public interest, it just might become a reality one day.
【小題1】We can learn from the first four paragraphs that the tower _____.

Elephants have four distinct personalities that help their herd survive in the African bush, scientists have found. 
With their grey skin, mournful eyes and slow heavy pace, you could be forgiven for thinking elephants are uniformly melancholy(憂郁的) creatures. But scientists have now discovered the largest living land animals have personalities to match their size.
In a new study of African elephants, researchers have identified four distinct characters that are common in a herd – the leaders, the gentle giants, the playful rogues(小淘氣) and the reliable plodders (辛勤工作的人).
Each of the types has developed to help the giant mammals survive in their harsh environment and is almost unique in the animal kingdom, according to the scientists.
Professor Phyllis Lee and her colleague Cynthia Moss studied a herd of elephants in the Amboseli National Park in Kenya known as the EB family — famous for their matriarch Echo before she died in 2009.
Using data collected over 38 years of watching this group, the researchers analyzed them for 26 types of behavior and found four personality features tended to emerge.
The strongest personality to emerge was that of the leader. Unlike other animals, where leadership tends to be won by the most dominant and aggressive individual, the elephants instead respected intelligence and problem solving in their leader. Echo, the matriarch and oldest in the group, her daughter Enid, and Ella, the second oldest female, all emerged as leaders.
The playful elephants tended to be younger but were more curious and active. Eudora, a 40-year-old female in the herd, seemed to be the most playful, consistently showing this feature throughout her life while playfulness in some of the other elephants declined with age.
Gentle elephants, which included two 27-year-old females Eleanor and Eliot, touched and rubbed against others more than the others.
Those that were reliable tended to be those that were most consistent at making good decisions, helped to care for infants in the herd and were calm when faced with threats. Echo and her youngest daughter Ebony seemed to be the most reliable.
Professor Lee said that elephants with these features tended to be the most socially integrated in the group while those who tended to be less reliable and pushy were more likely to split from the herd.
【小題1】From the passage we get to know that ________.

Researchers have found more evidence that suggests a relationship between races and rates of lung cancer among smokers. A new study shows that black people and Native Hawaiians are more likely to develop lung cancer from smoking. It compared their risk to whites, Japanese-Americans and Latinos.
Researchers at the University of Southern California and the University of Hawaii did the new study. The New England Journal of Medicine published the findings. The eight-year research studied more than 180,000 people. They included present and former smokers and people who never smoked. Almost 2,000 people in the study developed lung cancer.
Researchers say genetics might help explain the racial and ethnic differences. There could be differences in how people's bodies react to smoke. But environmental influences, including the way people smoke, could also make a difference.
African-Americans and Latinos in the study are reported smoking the fewest cigarettes per day. Whites are the heaviest smokers. But the scientists point out that blacks have been reported to breathe cigarette smoke more deeply than white smokers. This could fill their lungs with more of the chemicals in tobacco that cause cancer.
Scientists know that some diseases effect different groups differently. And some drug companies have begun to develop racially targeted medicines. Last June, the United States Food and Drug Administration approved a drug designed to treat heart failure in black patients. The name is BiDil. The agency called it "a step toward the promise of personalized medicine."
【小題1】Which of the following orders is from higher to lower risk of having lung cancer?

Left-Handers’ Day
International Left-Handers’ Day is August the thirteenth. The International Left-Handers Day, Web site says the Left-Handers Club started the holiday in 1992. It wanted left-handers around the world to celebrate. And it wanted to bring attention to the everyday problems of people who use their left hands.
One of these problems is difficulty using equipment and tools, like scissors. In general, most tools and equipment are made for people who are right-handed. The Left-Handers Club tries to educate designers and producers to consider the safety of left-handed people when producing their products.
Another problem is that many people have considered it bad to be left-handed. Some teachers and parents have tried to force children who used their left hands to use their right ones instead.
Scientists do not really know why some people are left-handed. They have believed the reason is genetic.They say the gene（基因） increases the chance of being left-handed. It appears to play an important part in deciding which part of the brain controls different activities. In right-handed people, the left side of the brain usually controls speech and language. The right side controls feelings. However, the opposite is often true in left-handed people.
Scientists believe the gene is responsible for this. The gene showed a link with left-handedness in nine to twelve percent of the population.
About ten percent of people around the world are left-handed.
【小題1】International Left-handers’ Day aims to（目的是） bring attention to_________.

At Dallas/Fort Worth Airport, the lights are controlled by sensors that measure sunlight. They dim immediately when it’s sunny and brighten when a passing cloud blocks the sun.
A wall of windows at a University of Pennsylvania engineering building has built-in blinds (百葉窗) controlled by a computer program that follows the sun’s path. Buildings are getting smarter and the next generation of building materials is expected to do even more.
Windows could catch the sun’s energy to heat water. Sensors that measure the carbon dioxide breathed out by people in a room could determine whether the air conditioning needs to be turned up.
Many new materials and technology have been designed in the last 15 years. They are now being used in a wave of buildings designed to save as much energy as possible. They include old ideas, like “green roofs”, where a belt of plants on a roof helps the building keep heat in winter and stay cool in summer, and new ideas, like special coating for windows that lets light in, but keeps heat out.
As technologies such as sensors become cheaper, their uses spread.
The elevators at Seven World Trade Center, which is under construction in New York, use a system that groups people traveling to nearby floors into the same elevator, thus saving elevator stops. People who work in the building will enter it by swiping (刷) ID cards that will tell the elevators their floor, readouts will then tell them which elevator to use. The building also has windows with a coating that blocks heat while letting in light.
More new building materials and technology are in development. A Philadelphia building firm is now working on “smart wrap” that uses tiny solar collectors to catch the sun’s energy and transmitters (傳輸器) as wide as a human hair to move it. They are expected to change the face of the construction industry in the next ten years or so.
【小題1】________ will be developed and used in the construction industry.