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

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

In the year 1986 there was a terrible explosion(爆炸). The explosion was at a nuclear power plant(核电站) in Ukraine. The radiation(辐射) caused a lot of damage. It polluted the soil and other things. People were living in the area when the explosion happened. More than twenty years later those people are still suffering. The influence of the explosion will go on for a long time.
Over two million people still live in that area. Only 56 people died from the explosion but many other problems have been caused because of it. Some types of cancer are more than 200 times above the world average(平均水平). Many children have cancer now and children born with problems have doubled since the accident.
Some people in the United States are worried about the children living in the explosion area. One group has been trying to raise money. They are called the Chenobyl Children’s Project. They want to bring children from Ukraine to the U.S. each summer.
A spokesperson for the group says that radiation is the highest in the summertime so it is a good time to get the children out of the country. They want to help the children get away for a little while. The Project wants them to be safe from radiation.
It costs $1,500 to bring each child to the United States for six weeks. The group raised enough money to bring 28 children to the United States last year. The children were able to do lots of fun things. They enjoyed clean air, healthy food, and plenty of outdoor fun. One little nine-year-old girl who got to come to the United States said that she likes America.
The spokesperson says that the children that come to America during the summer miss less school when they return home because they have a long summer vacation.
【小题1】What can we learn about the explosion that happened in 1986?

In the year 1986 there was a terrible explosion(爆炸). The explosion was at a nuclear power plant(核电站) in Ukraine. The radiation(辐射) caused a lot of damage. It polluted the soil and other things. People were living in the area when the explosion happened. More than twenty years later those people are still suffering. The influence of the explosion will go on for a long time.

Over two million people still live in that area. Only 56 people died from the explosion but many other problems have been caused because of it. Some types of cancer are more than 200 times above the world average(平均水平). Many children have cancer now and children born with problems have doubled since the accident.

Some people in the United States are worried about the children living in the explosion area. One group has been trying to raise money. They are called the Chenobyl Children’s Project. They want to bring children from Ukraine to the U.S. each summer.

A spokesperson for the group says that radiation is the highest in the summertime so it is a good time to get the children out of the country. They want to help the children get away for a little while. The Project wants them to be safe from radiation.

It costs $1,500 to bring each child to the United States for six weeks. The group raised enough money to bring 28 children to the United States last year. The children were able to do lots of fun things. They enjoyed clean air, healthy food, and plenty of outdoor fun. One little nine-year-old girl who got to come to the United States said that she likes America.

The spokesperson says that the children that come to America during the summer miss less school when they return home because they have a long summer vacation.

1.What can we learn about the explosion that happened in 1986?

2.Why does the group bring children to the U.S. in summer?

3.Which of the following is TRUE about the Project?

4.What does the underlined word in Paragraph1 mean?

A. effort     B affect    C. offer     D. effect

语境填词, 注意动词形式。（每空1分，满分25分）
【小题1】Everyone think it is  _(荒谬的)to predict that the sun will not rise tomorrow.
【小题2】They marked the ________(分界线)of the football fields several days before the game. 
【小题3】We all __________ (渴望)peace and happiness．
【小题4】Flower arrangement ()is an__________ (高雅的)art．
【小题5】The new law__________ (宣告)that this was illegal．
【小题6】She__________ (陪伴)her friend to the concert last night.
【小题7】The theatre has very good access for the _________________ (残疾人).
【小题8】They have made an_________(紧急)request for international aid.
【小题9】The foundation would like to launch programs for providing _____________ (援助) for poor areas in Africa.
【小题10】The novel is an important form of _ ______.(文学)
【小题11】One of her  a ___________ is to become a doctor.
【小题12】Remember not to e______ them by asking personal questions.
【小题13】The girl gave a  v_________description of the event.
【小题14】Hotel  a_________was scarce during the Olympic Games.
【小题15】Did anyone  w________the traffic accident?
【小题16】Don’t  a______yourself  to drinking.
【小题17】When  you _____   ______  trouble and need help, please turn to me .
【小题18】This machine is invented to ______   _____ the quality of the products.
【小题19】I quickly_____   _____ the change  in temperature.
【小题20】She was  _____   _____    _____    when hearing the sound of explosion(爆炸).