Forests have always been useful and important to man who makes use of them in many ways. Every day trees are serving man everywhere. Trees supply man with fruits and building materials in the form of wood. Without trees it would be impossible to build houses, boats, bridges and so on. Furniture such as desks, chairs and beds is made of wood. Trees can stop man from terrible heat. They're also useful in preventing good and rich top soil from being washed away during heavy rains.

　　If there were no trees, heavy rains would wash away the rich top soil that is so important to plants. The result is that the land will become a desert. There are plenty of desert areas in the world. A long time ago these desert areas used to be very rich areas, but man in the past had no enough knowledge about science of nature, they cut down too many trees in the area where they lived and never planted new ones. By and by the rich top soil was blown and washed away by strong winds and heavy rains. In the end the rich land changed into useless deserts where nothing could grow.

According to the passage, ______.

　　　　A. a long time ago, man didn't know how to make use of wood

　　　　B. trees are not as useful as they were in the past

　　　　C. trees were more found in the past than they are today

　　　　D. people have always found trees useful

　　If there were no trees, ______.

　　　　A. the land would become better　　　　B. heavy rains would be very clean

　　　　C. the rich soil couldn't be kept　　　　 D. there wouldn't be any plants

　From the passage, we know that man must ______.

　　　　A. do nothing to keep the balance（平衡）of nature

　　　　B. take his best to keep the balance of nature

　　　　C. try his best to keep the balance of nature

　　　　D. do his best to stop the balance of nature

In the summer of 1936, people all over the world heard the name of Jesse Owens. That summer, Jesse joined the best athletes from 50 nations to compete in the Olympic Games. They met in Germany, in the city of Berlin.

There was special interest in the Olympic Games that year.

Adolf Hitler was ruler of Germany. Hitler and his Nazi Party believed that white people—especially German people—were the best race of people on earth. They believed that other races of people—especially those with dark skin—were almost less than human. In the summer of 1936, Hitler wanted to prove his beliefs to the world. He wanted to show that German athletes could win every important competition.

Jesse Owens was black, too. Until 1936, very few black athletes had competed in the Olympic Games for the United States. Jesse was proud to be on the team. He was very sure of his ability.

Jesse spent one week competing in four different Olympic track and field events in Berlin. During that time, he did not think much about the color of his skin, or about Adolf Hitler. At last, Jesse Owens won the highest award—the gold medal—in all four of the Olympic, competitions he entered. In the hundred meter run, he equaled the fastest time ever run in that Olympic event. In the long jump and the 200-meter run, he set new Olympic records. And as part of a four-man team, he helped set a new world record for the 400-meter relay race.

　　  1. How many nations took part in the Olympic Games in 1936?

　　　　  A. 50　　　　   B. 55　　　　　　　　  C. 60    　　　　  D. 65

　　  2. What can be inferred from the passage?

　　　　  A. Hitler thought of Jesse Owens as a hero.

　　　　  B. Hitler believed that black people were worse than white people.

　　　　  C. Jesse Owens was black.

　　　　  D. Jesse Owens was not confident in himself when he took part in the Olympic Games.

　　  3. In which city was the Olympic Games held in 19367

　　　　  A. In New York.　　　　    B. In London.

　　　　  C. In Germany.　　　　　　 D. In Berlin.

　　  4. What does the passage mainly talk about?

　　　　  A. Hitler's belief that German people were better than any other race of people in the world.

　　　　  B. Black young man—Jesse Owens—became famous by winning four gold medals in the Olympic Games in 1936.

　　　　  C. Jesse succeeded in the Olympic Games because of his hard training.

　　　　  D Hider hated black people, especially Jesse Owens.

 

 You can’t _____ until tomorrow morning after the blood examination.

　 A. not only eat but also drink 　 B. either eat or drink

　 C. neither eat nor drink 　     D. both eat and drink

Memory, they say, is a matter of practice and exercise. If you have the wish and really make a self-effort, then you can quite easily improve your ability to remember things. But even if you are successful, there are times when your memory seems to play tricks on you.
　　Sometimes you remember things that did not happen. One morning last week, for example, I got up and found that I had left the front door unlocked all night, yet I clearly remembered locking it carefully the night before.
Memory “trick” works the other way as well. Once in a while you remember not doing something, and then find out that you did. One day last month, for example, I was sitting in a barber(理发师) shop waiting for my turn to get a haircut, and suddenly I realized that I had got a haircut two days before at the barber shop across the street from my office.
　　We always seem to find something funny in incidents（小事） caused by people’s forgetfulness or absent-mindedness(心不在焉). Stories about absent-minded professors have been told for years, and we never got tired of hearing new ones. Unfortunately, however, absent-mindedness is not always funny. There are times when “trick” of our memory can cause us great trouble. （words: 169）
【小题1】If you want to have a good memory, ________.

A．you should force yourself to remember things

B．you should make a self-effort of practice and exercise

C．you should never stop learning

D．you should try hard to remember things

【小题2】Which of the following statements is TRUE according to the passage?

A．One night the writer forgot to lock the front door.

B．One night the writer forgot having locked the front door.

C．The writer remembered to lock the door.

D．The writer remembered unlocking the front door.

【小题3】From the sentence "We never get tired of hearing new ones", we can infer that______.

A．we enjoy hearing new stories about absent-mindedness of professors

B．we don’t want to know anything more about absent-mindedness of professors

C．we will never get rid of（摆脱） listening to new stories about absent-mindedness

D．absent-mindedness happens not only to professors but to many other people

Force other than damaging winds are also at work inside tornadoes. Sometimes, as the turning, jumping funnel(漏斗) passes over a house, the walls and ceiling burst apart as if a bomb had gone off inside. This explosion(爆炸) is caused by the low air pressure at the center of a tornado.

The pressure at the center of a tornado is usually 13 pounds per square inch. However, inside the house the air pressure is normal, about 15 pounds per square inch. The difference of 2 pounds per square inch between the inside and outside pressure may not seem like much. But suppose a tornado funnel passes over a small building that measures 20 by 10 by 10 feet. On each square inch of the building, there is 2 pounds of pressure from the inside that is not balanced by air pressure outside the building. On the ceiling, that adds up to an unbalanced pressure of 57,600 pounds. The pressure on the four walls adds up to 172,800 pounds.

If windows are open in the building, some of the inside air will rush out through them. This will balance the pressure inside and outside the building. But if the windows are shut tightly, the great inside pressure may cause the building to burst.

　　Unfortunately, heavy rain happens in thunderstorms that later produce tornadoes. So, people often shut all windows to protect their property. This may cause far worse damage later.

63. Which of the following is the main topic of the passage?

A. Where tornadoes are formed.  　　      B. When tornadoes usually occur.

C. How tornadoes can be prevented.　　     D. Why tornadoes cause so much damage.

64. According to the passage, tornadoes can destroy building because the _____.

A. force of a tornado increases the air pressure in a building

B. air pressure at the center of a tornado is over 172,000 pounds

C. weight of a tornado can crush a building’s roof when it passes overhead

D. air pressure inside a tornado is less than the air pressure inside a building

65. According to the passage, the pressure on a building during a tornado can be reduced　　　　by _____.

A. closing the windows 　　　　　        B. opening the windows

C. using an electric fan 　　　　          D. making the roof and walls stronger