In the second half of each year, many powerful storms are born in the tropical(热带的)Atlantic and Caribbean seas. Of these, only about half a dozen becomes the strong, circling winds of 75 miles per hour or more that are called hurricanes, and several usually make their way to the coast. There they cause millions of dollars of damage, and bring death to large numbers of people.
The great storms that hit the coast start as soft circling wind hundreds — even thousands — of miles out to sea. As they travel aimlessly over water warmed by the summer sun, they are carried westward by the southeast winds. When conditions are just right, warm, moist(潮湿) air flows in at the bottom of such a wind, moves upward through it and comes out at the top. In the process(过程), the moisture in this warm air produces rain, and with it the heat is changed to energy in the form of strong winds. As the heat increases, the young hurricane begins to move in a counter-clockwise motion(逆时针运动).
The life of a hurricane is only about nine days, but it contains almost more power than we can imagine. The energy in the heat released(释放) by a hurricane’s rainfall in a single day would satisfy the entire electrical needs of the United States for more than six months. Water, not wind, is the main source of death and destruction(毁灭) in a hurricane. A typical hurricane brings 6 to 12 inch downpours, causing sudden floods. Worst of all is the powerful movement of the sea — the mountains of water moving toward the hurricane center. The water level rises as much as 15 feet above normal as it moves toward shore.
【小题1】When is an ordinary tropical storm called a hurricane?

Levi Strauss was born in Bavaria (巴伐利亚) in Europe in 1829. He emigrated（移居）to the United States of America when he was seventeen years old. His brothers sold cloth, and he worked for them even though he could not speak English very well. At this time many people were moving to California because gold was discovered there. Strauss went to look for gold, too.

Strauss took a lot of cloth with him to San Francisco. He thought that he could make tents out of the cloth and sell them to people working in the gold fields. But when he got there, he saw that people had a greater need for clothes than tents. Clothes did not last very long in the gold fields. At first Strauss made pants out of canvas（帆布）. They were very strong ---- much stronger than other pants. Soon everyone was wearing them , so he decided only to make pants. He opened a small store and made a lot of money from selling pants.

After a while, Strauss found a material even stronger than canvas. It came from a town in France called Nimes. The French called the material serge de Nimes, which means “cloth from Nimes”. The Americans called it denim. Strauss also bought some cloth from Genoa, a town in Italy. To Americans this name sounds like “jeans”, so they called his pants jeans. The cloth that Strauss used was always blue, so people also called his pants blue jeans and blue denims. Other people called them Levi’s. Levi Strauss jeans are some of the best-selling jeans in the world today. They last a long time and are very comfortable.

56. When Levi Strauss went to San Francisco for the first time, he wanted to ______.

A. find a strong material to make pants

B. work for his brothers

C. make money by selling tents

D. open a store to make pants

57. In the beginning Strauss made pants from ______.

   A. serge de Nimes         B. silk

C. denim                D. canvas

58. The name “jeans” was first used by ______.

A. Bavarians             B. Americans

C. Italians               D. Frenchmen

59. The story is about ______.

A. where cloth came from

B. the man who first made jeans

C. how to make lots of money

D. life on the gold fields

Car companies are developing vehicles that will plug into electric sockets，just like many laptops，digital cameras，cell phones and Mp4 do．Called“plug-in vehicles”，these cars will get most of their power from electricity. Their drivers won't have to stop at gas stations as often as usual．
The technology is more than just cool. In our car-filled world，plug-in vehicles could reduce the amount of gas we use，which keeps rising in cost now and then. Besides，driving around in these vehicles may even help the environment．Gas-burning cars produce a lot of greenhouse gas，which causes globe warming.
The first company-produced plug-in vehicles could hit the roads by 2010. But engineers still have a lot of work to do to make the technology practical and inexpensive．
Batteries(电池) are the biggest challenge. In the plug-in-vehicle world，Li-ion(锂离子)batteries are getting the most attention．These batteries can store a large amount of energy in a small package，and they last a longer time between charges．Li-ion batteries can fit laptops，cell phones，heart instruments and other similar pocket ones.
But because cars are so big and heavy, it would still require a suitcase-sized Li-ion batteries to power about 12km of driving．What's more，the batteries are much expensive．
“A car filled with batteries could go a long distance，”says Ted Bohn, an electrical engineer in Chicago．“But it couldn't pull any people．and it would cost $100,000．”
So researchers need to work out how to make batteries smaller and cheaper，among other questions.
“The answers don't exist yet，”Bohn says，“As a kid，I thought someone someplace knows the answer to everything．All of these questions haven't been decided．That's what engineering is about-making a guess，running tests and getting fine results．”
72．The passage mainly talks about        of a new car
A．the developing    B．the speed    C．the appearance D．the batteries
72．Which is true according to the passage?
A．The“plug-in vehicles”will use electricity completely as driving power．
B．The new technology will help protect our environment．
C．The technology of using electricity as driving is quite practical now．      
D．The biggest challenge of the new technology is that it will cost us more energy．
74．How does Bohn feel about the future of the technology according to the last paragraph?
A．Confident    B．Puzzled．    C．Worried． D．Disappointed．
75．According to the passage，the new technology is facing the following problems except that ．
A．the new technology cannot come into use at present
B．the cost of the new technology is quite high
C．the government won't support the technology
D． the size of the batteries is too big at present

Free Fun Guides

All sorts of items become litter(垃圾) but two of the most common and most dangerous are cigarette butts（烟头) and plastic bags. Litter is a big problem for our environment but it is a problem that individuals can easily do something about. Not littering at all or cleaning up litter, such as  cigarette butts and plastic bags, greatly improves the quality of our environment.

Although cigarette butts, are small, they are bad for the environment. Over 1,600 billion cigarette are smoked each year in China and large quantities of the butts are thrown away. Worldwide, about 4. 5 trillion butts are littered every year. Apart from the fact that butts spoil the beauty of the environment, they contain some very toxic chemicals. These find their way into the water supply where they decrease the quality of the water and endanger plants and animals that live there. So, if people have to smoke, they shouldn't throw away the butts but put them in the rubbish bin instead.

Plastic bags are another common form of litter that is a danger to the environment. There areseveral reasons for this. They are made from oil and gas, which are non—renewable resources. If they are not recycled, these resources are lost to us. In China, 2 billion plastic bags are used every day. An enormous number of these become litter. This is a huge problem because they last from 20 to 1,000 years in the environment. They float easily in the air and water and travel long distances. They find their way to rivers, parks, beaches and oceans. Plastic bags kill up to one million seabirds, 100, 000 sea mammals and countless fish each year worldwide. It is up to people not to let plastic bags become litter. It would be better if they used fewer and recycled them.

Cleaning up your cigarette butts and plastic bags would improve the environment. And we would know that we were doing something to look after our planet. However, I believe the best solution would be not to smoke or use plastic bags at all.

Which of the following best shows the structure of the passage?

A           B.         C.          D.

( ①= paragraph 1; ②= paragraph 2; ③= paragraph 3; ④a paragraph 4 )

The word “toxic” in the paragraph 2 most probably mean “________”

A. precious     B. extra    C.poisonous      D. useless

From the text. we know the fact that_________

A. Chinese smokers litter up to 4. 5 trillion butts every year

B. people in the world use 2 billion plastic bags in a single day

C. plastic bags cause 1 million deaths of seabirds each year worldwide

D. the butts can last 20 to 1,000 years in the environment of China

What's probably the best title of the passage?. Clean Up Your

A. Say Goodbye to Smokin   B. Protect the Endangered Sea Animals     . C.Use Paper Bags Now      D.Clean Up Your Butts and Bags