At last firemen have put out a big forest fire in California．Since then，they have been trying to find out how the fire began．Forest fires are often caused by broken glass or cigarette ends which people carelessly throw away．Yesterday the firemen examined the ground carefully，but were not able to find any broken glass．They were also quite sure that a cigarette end did not start the fire．This morning，however，a fireman accidentally discovered the cause．He noticed the remains of a snake which was wound round the electric wires of a 16000—volt (伏特) power line．In this way，he was able to solve the mystery (谜)．The explanation was simple but very unusual．A bird had snatched up the snake from the ground and then dropped it on to the wires．The snake then wound itself round the wires．When it did so，it sent sparks(火花) down to the ground and these immediately started a fire．

1. Since the big forest fire was put out，the firemen__________.

    A．have been busy with the accident

    B．have been more and more careful of forest fires

    C．have been solving the problems caused by fire

    D．have been trying to discover its cause

2.There was not any evidence(证据)to show the big fire was started by_________．

A．broken glass　　　　   B．a cigarette end

C．electricity　　　　    D．either A or B

3. It was________ that caused the fire．

    A．the bird　　　　　　   B．the snake

    C．the wires　　　　　　  D．the power lines

4. At last the fireman__________．

    A．noticed the remains of a snake

    B．found out the cause

    C．discovered a snake wound round the electric wires

    D．saw the snake sending sparks down to the ground

5.The cause of the fire was considered__________．

    A．simple　　　　    B．ordinary

    C．uncommon　　　　  D．obvious

Before 1900, many theories existed as to the cause of yellow fever(黄热病)．Some doctors were sure the disease was air-borne；others felt that it was spread from person to person．Dr．Carlos Finlay, a well-known Cuban doctor of that time，had long held the theory that it was caused by the bite of mosquito(蚊子)．But neither the public nor the doctors then accepted his idea．

    Despite this，Walter Reed, an American doctor sent to study yellow fever in Cuba，went to talk with Finlay．Reed，after reading a lot on the subject，had begun to think that Dr．Finlay might be right．Then Reed and his comrades set to work at once．Outside Havana，they set up a laboratory and began experiments to test the theory．The experiments were successful．Now we know：A period of about two weeks must pass before a mosquito，after feeding on a sick person，could infect(传染)another person; the sick person had to have yellow fever a certain number of days before the mosquito biting him was able to carry the disease．

1. Before 1900，many people didn't think yellow fever was spread___________.

A．by air

    B．by getting in touch with the patient

    C．by the bite of mosquitoes

D．by dirty water

2. What is true according to the passage?

A．Reed agreed with Finlay after his talk with him．

B. Reed proved the theory by reading a lot of articles．

C．Reed proved the theory in his American lab．

D．Reed scientifically proved the theory.

3. Who first realized the actual cause?

    A．The public．　　　　 B．Reed．

    C．Finlay．　　　　　　 D．Doctors．

4. A person comes down with yellow fever because he has been bitten_______．

   A．by a mosquito

   B．by a mosquito that has bitten the patient

   C．by an infected mosquito

   D. by a mosquito that has bitten the patient of some days

5. What is the possible title for the passage?

    A．Reed，an Outstanding Doctor

    B. Several Theories on Yellow Fever

    C．Fight Against Yellow Fever

    D．The Cause of Yellow Fever

Beijing—Set off by the April 1 Sino-US plane collision and US official agreement of the biggest arms sale to Taiwan in a decade(ten years) as well as remarks by US President Bush on defending Taiwan, there have been increasing hacker(黑客)attacks on websites(网站)of the two countries in the past weeks.

An American group of hackers which calls itself Poison Box had begun ruining Chinese websites after the April 1 spy plane incident, top Chinese portal Sina.com. said.

The Chinese soon attacked back.

On April 29, Chinese hackers invaded two US Government websites over the weekend, forcing the Department of Labor and the Department of Health and Human Services to shut down their sites for a short time.

The US Department of Labor went off line for a few hours after a page in its website was changed to show a picture of Wang Wei, the Chinese pilot who died in the collision.

The page was titled“China Hack!”and read, in English,“The whole country is sorry for losing the best son of China—Wang Wei forever, we will miss you until the end of the day.”

On May 1, hackers exchanged bad remarks in which the official White House website was destroyed by a huge amount of e-mail rubbish. On May 5,the White House website suffered because of a denial(拒绝) of service attack that blocked entrance to the site for more than two hours.

The Computer Network and Information Security Management Office told web operators an average of 100 sites a day had seen“some more form of attack.”

1. The best title of the passage is______.

A. Sino-US Plane Collision

B.Sino-US Hackers Fighting Cyberwar

C.100 Sites Beijing Attacked

D.Cyberwar Continuing

2. What is the correct order of the events?

A.Wang Wei’s picture appeared on a US website.

B.Poison Box destroyed some Chinese websites.

C.The access to White House website was blocked for over two hours.

d. Hackers exchanged bad remarks.

A.a,b,c,d　　　　　　　　　　  B.a,c,b,d　　　　　　　　　　  C.b,a,d,c　　　　　　　　　　  D.b,a,c,d

3. From the passage we can infer that______.

A.US President Bush defended Taiwan

B.all the Chinese people are sorry for losing the best son of China

C.websites in the US and China have been watchful for attacks

D.Chinese hackers began to play an important role in foreign affairs

If you were to dive deep into the ocean, you would notice the colors act strangely as you move deeper into the water.

At first before you’ve gone very far down, the colors will seem normal. But as you dive deeper, you begin to wonder where all the warm colors have gone. You try to catch sight of reds or yellows or oranges.

Then as you sink still farther, you will see only blues and purples(紫色).Soon these, too, begin to lose colors as you go down.

Now, far below the surface of the water, you will find yourself in a gray(灰色)，colorless place. The water above you is filtering out all of the sunlight’s rainbow(彩虹) of light.

If you continue to go down, you will soon be so far below the surface that no light can reach you. The blackness will become so complete that your eyes will ache to see something, then anything. Now you are ready to return to the surface, with its changing colors.

1. As a person dives deeper, he can see the colors______.

A. remain the same　　　　　　　　　　　　　　　　　　　　   B.disappear

C.change　　　　　　　　　　　　　　　　　　　　　　　　　　　　 D.become lighter and lighter

2. Which of the following is the color you will see later as you go deeper?

A. Normal color.　　　　  B.Red.　　 C.Orange.　　   D. Purple.

3. Why will your eyes ache when the blackness becomes complete?

A. The water is too cold.

B.Something is seriously wrong with your eyes.

C.Your eyes are looking for any sign of light.

D.You have stayed too long in the water.

4. How do you feel when you’ve dived deep enough and everything becomes dark?

A. You are eager to dive deeper.

B.You want to go on diving to the bottom of the ocean.

C.You are anxious to return to the surface.

D.You feel relaxed(放松)in the quiet darkness.

5. On your way back, you will see colors change______.

A. from red to black and orange　　　　　　　　　　　　 B.from purple to orange and red

C.from purple to grey and yellow　　　　　　　　　　   D.from yellow to orange and blue

Mrs. Cook was born in a shopkeeper’s family. Her father had several shops in the city and most of his friends are important persons. The man liked his daughter very much and often took her to the parties. He tried his best to satisfy her with (以……令……满意) everything and she wasn’t afraid of anybody.

She married Mr. Cook, a famous actor, when she was twenty-two. Her father gave her all and she did no housework at home. She often did everything she wanted and made all the family listen to her. She had a few servants(佣人),but none of them could wait on(伺候)her. Neither the servants nor her husband liked her.

Last week she employed a new servant called Betty. The girl had studied in a middle school before her father died in an accident. The girl was kind and clever. She had read a lot by then and now she knewmuch. She had been told about the woman before she came here. She was sure she could deal with(对付)the woman.

The woman liked the strong and tall girl as soon as she saw her. “Remember, Betty,”said she.“You must be honest and obedient. Do you understand me?”

“Yes, Mrs. Cook,”said the girl.“But what should I do if you let me tell the visitor that you aren’t in?”

1. The man tried his best to satisfy his daughter with everything because ______.

A. he was very rich

B.he liked her very much

C.she knew plenty of important persons

D.she wasn’t afraid of anybody

2. The girl married Mr. Cook because ______.

A. he was rich too　　　　　　　　　　　　　　　　　　　　    B.he had a few servants

C.he always listened　　　　　　　　　　　　　　　　　　　　 D.he was a famous actor

3. None of the family liked the woman because ______.

A. she made them all obey her

B.It was difficult for the servants to wait on her

C.she always did everything she wants

D.she never did any housework at home

4.______, so Betty stopped to be a servant.

A. The rich woman would pay her much

B.The rich woman would be kind to her

C.She hated to go on studying at school

D.She had to earn(挣)some money for her family

5. Betty knew how to deal with the woman because ______.

A. she was a middle school student

B.she was very clever

C.she knew her well

D.she had read a lot by last week

Deep inside a mountain near Sweetwater in East Tennessee is a body of water known as the Lost Sea. It is listed by the Guinness Book of World Records as the world’s largest underground lake. The Lost Sea is part of an extensive (covering a large area) and historic cave system called Graighead Caverns.

The caverns have been known and used since the days of the Cherokee Indian nation. The cave expands (becoming large in size) into a series of huge rooms opening on the side of the mountain. One mile from the entrance, in a room called“The Council Room”,many Indian artifacts(手工艺品)have been found.

For many years it had been considered that there was a large underground lake somewhere in a cave, but it was not discovered until 1905. That year, a thirteen-year-old boy named Ben Sands crawled into a small opening three hundred feet underground. He found himself in a large cave half filled with water.

Today, tourists visit the Lost Sea and ride far out onto it in glass-bottomed boats. More than thirteen acres ( 英亩 ) of water have been mapped out so far and still no end of the lake has been found. Even though teams of divers have tried to explore the Lost Sea, the full extent (the size of a large area)of it is still unknown.

1. The Lost Sea is completely different from any others because it is______.

A. part of a historical cave system

B.the biggest underground lake in the world

C.listed in the Guinness Book of World Records

D.the largest body of water in Tennessee

2. The Graighead Caverns have been known______.

A.throughout history

B.since the time of the Indian nation

C.since 1905

D.since divers explored them

3. Who discovered the Lost Sea in recent times?

A. Ben Sands.　　　　　　　　　　　　　　　　　　　　　　　　      B. Boys.

C. The Cherokee Indians.　　　　　　　　　　　　　　　　　　　　 D. Scientists.

4.What was found in“The Council Room”?

A. A small natural opening.　　　　　　　　　　　　　　    B. A large cave.

C. Another series of rooms.　　　　　　　　　　　　　　   D.Manyold Indian objects.

5. It can be inferred from the passage that the Graighead Caverns presently serve as______.

A. an underground lab　　　　　　　　　　　　　　　　　　   B.an Indian meeting ground

C.a place of interest　　　　　　　　　　　　　　　　　　　　　　　　 D.a museum

It’s interesting that the arrival of snow has a different effect on people in different countries. For some countries it is an important happening to celebrate each year, while for others it is a catastrophe(灾难)or even a wonder.

There are countries between these two extremes that normally expect snow some time over the winter months, but never receive snow regularly or in the same quantities every year. Britain is one such country, for which the arrival of snow quite simply creates problems. Within hours of the first snowfall, however light, roads are blocked; trains and buses stop in the middle of the traffic. Normal communications are affected as well, telephone calls become difficult and the post immediately takes more time than usual. Almost within hours, there are also certain shortages—bread, vegetables and other things—not because all these things can no longer be produced or sent to shops, but mainly because people are frightened, and go out to store up these commodities,“just for fear that something bad should happen.”

Why then does snow have this effect? After all, the Swiss, Austrians and Canadians don’t have such problems. It is simply because there is not enough planning and preparation. We need money to buy equipment to deal with snow and ice. To keep the roads clear, for example, requires snowploughs and machines to spread salt. The reason why a country like Britain does not buy snow ploughs is that they are only used for a few days in any one year, and the money could be more useful in other things such as hospitals, education or helping the old.

1. According to the writer, Britain is a country______.

A. which has regular snow

B. which is not well prepared for snow

C. for which snow is not a catastrophe

D. for which snow is a wonder

2. The arrival of snow in Britain affects all of the following except______.

A. traffic　　　　　　　　　　　　　　　　　　　　　　　　　　　　 B. communications

C. food supplies　　　　　　　　　　　　　　　　　　　　　　   D. service quality

3. After a few hours’ snowing there are often shortages of food because______.

A. shops have closed down

B. people buy as much as they can

C. farmers cannot produce any more

D. people eat more vegetables in winter

4. The first reason that the British do not buy snow ploughs is that______.

A. spreading salt is good enough　　　　　　　　　　    B. old people need more money

C. snow ploughs are not used often　　　　　　　　    D. the hospital is more important

5.The words“two extremes”in the second paragraph mean the countries______.

A. which have snow either as yearly happening to celebrate or as rare weather

B. which either have heavy snow or light snow

C. to which snow either causes problems or no problems

D. which either have snow-ploughs or no snow-ploughs

The Garden of Eden is said to be a beautiful place which gives joy. Where could it be found? The Garden of Eden is the place where God is supposed to have created a garden for Adam, the first man. Some people hold it to have been situated in the Mesopotamian region between the River Tigris and Euphrates. The Tree of Knowledge grew in this garden and it was there that man fell from grace in God’s eyes because he ate fruit from this tree, urged by Eve, the first woman.

As they did what they were told not to do, it is said, God devised three punishments. The man was to farm the earth, which was cursed; the woman was to experience painful childbirth; and the snake who urged the woman to persuade the man to eat the fruit was from that day on to be hated by mankind. Adam had to be driven out of the Garden of Eden because the Tree of Life also grew there and this would have given him eternal(永恒的) life. It is said that in the end man is given knowledge and death rather than ignorance and eternal life.

The Garden of Eden has been represented in many famous paintings and poems. In man’s imagination it has always been an ideal to which he longs to return.

1.　Which of the following statements about the fruit in the Garden is true?

A. The man and the woman were not allowed to eat the fruit.

B.Everybody could try the fruit.

C.God asked people not to share the fruit.

D.Anybody who ate the fruit would be stupid.

2. Adam and Eve were to be punished by God just because ______.

A. Eve ate the fruit from the Tree of Knowledge

B.they did what they were told not to do

C.they touched the Tree of Knowledge in the Garden

D.Adam loved Eve so much

3.The sentence“man fell from grace in God’s eyes”means that ______.

A. God would not create any garden for man

B.human beings were not clever in God’s eyes

C.man lost the kindness from God

D.God found the mistake made by man

4. What is the main idea of this passage?

A.The Garden of Eden can’t be found, although people long to go there.

B.The Garden is situated somewhere between the River Tigris and Euphrates.

C.The Garden of Eden has been the main subject of paintings and poems.

D.God created the Garden but man destroyed it.

Baths and bathing have been considered as an important medical therapy to man. In Greece there are the ruins of a bathtub and water system built over 3 000 years ago. The Romans had warm public baths. In some public baths as many as 3 000 persons could bathe at the same time.

Treating diseases by bathing has been popular for centuries. Modern medical bathing, or hydrotherapy, first became popular in Europe and by the late 1700’s also became popular in the United States.

For many years frequent bathing was believed to be bad for one’s health. Ordinary bathing just to be clean was avoided, and perfume(香水) was used to cover up body and smell.

By the 1700’s doctors began to say that soap and water were good for health. They believed that it was good for people to be clean. Slowly, people began to bathe more frequently.

In the United States ordinary bathing was slow to become popular. During the 18th and early 19th centuries, many Americans were known as“the great unwashed”.In one American city, for example, a person could only take a bath every 30 days! That was a law.

Frequency of bathing today is partly a matter of habit. People know that bathing for cleanliness is important to health. Doctors know that dirty bodies increase the chance of disease. Therefore in the United States people generally bathe often.

1.What does the word“hydrotherapy”underlined in the second paragraph refer to?

A. A bathing tub.　　　　　　　　　　　　　　　　　　　　　　  B. Medical bathing.

C. Ordinary bathing.　　　　　　　　　　　　　　　　　　　　 D.　Warm public baths.

2．Until when did doctors believe that ordinary bathing was good for health?

A. Until the 16th century　　　　　　　　　　　　　　　　　　　　  B.　Until the 17th century.

C. Until the 18th century.　　　　　　　　　　　　　　　　　　　　 D. Until the 19th century.

3.　Where did the ordinary bathing first become popular according to the passage?

A. In Africa.　　　　　　　　　　　　　　   　　　　　　　　　　 B.In Europe.

C.　In the USA.　　　　　　　　　　　　　　　　　　　　　　　　　　  D.The passage doesn’t tell us.

4.　Which of the following statements is not true?

A. Bathing was important to Greeks and Romans.

B.The Greek built water systems.

C.The Greek had warm public baths.

D.The Greek used bathtubs.

5.　The passage is mainly about ______.

A. bathing in the USA

B.the good points and bad points of bathing

C.the history of bathing

D.the modern medical bathing

Have you ever heard of Angel Falls? It’s the highest waterfall in the world, deep in the jungles of Venezuela. Few people have ever seen Angel Falls. It’s very hard to get there. If you went by land, you would have to travel for weeks through thick jungles. If you went by plane from Caracas, a city on the southern coast, it would take about four hours.

What would it be like to take a trip by plane from Caracas to the falls? For hundreds of miles you would become higher, and you would see mountains with forests. Soon the land would level out to high plateausお(高原). Finally, you would fly toward a deep canyon (峡谷) with steep, rocky sides.

Suddenly you could see a silver thread in the distance. Then as your plane flew closer, you would see the waterfall more clearly. You would see water falling over half a mile straight down the cliff. It is a sight you would never forget. No one knew about this high waterfall until 1930. お That year James Angel, an American pilot, flew over the area. As he was flying over the mountains and canyons, he suddenly saw a waterfall. It was an impressive sight: the water seemed to be dropping straight out of the clouds.

In 1941 an American expedition explored and measured the falls. From the top to the bottom, the water falls 3 200 feet. These falls are over 1 000 feet higher than any other falls in the world.

1. Few people have ever seen Angel Falls, as ______.

A. it is surrounded by thick jungles

B.it requires a long and difficult trip to go there

C.people have to travel on foot for weeks to get there

D.no one but a pilot can fly close to it

2. Angel Falls was probably named after ______.

A. the man who first explored the waterfall by land

B.the American pilot who first discovered it

C.the expedition which first measured the waterfall

D.none of the above

3. This passage suggests that ______.

A. none of the other waterfalls in the world are over 1 000 feet high

B.the second highest waterfall is over 2 200 feet

C.the second highest waterfall is not over 2 200 feet

D.all the other waterfalls in the world are not over 1 000 feet high

4. It can be inferred from this passage that ______.

A. Angel Falls is a memorable scene which is worth seeing

B.since its discovery millions of people have seen Angel Falls

C.Angel Falls is located in the jungles near Caracas

D.American pilots are very sensitive