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Force other than damaging winds are also...

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

 

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Many of the world’s pollution problems have been caused by the crowding of large groups of people into the cities. Supply for the needs of the people leads to further pollution by industry. If the rapid increase of world population in countries continues at the present rate, there may be much greater harm to human beings. Some scientists speak of the increase in numbers of people as “population pollution.”

About 2,000 years ago, the world population was probably about 250 million. It reached a billion in 1850. By 1930 the population was two billion. It is now three and a half billion. It is expected to double by the year 2,000. If the population continues to grow at the same rate, there will be 25 billion in the world a hundred years from now.

Man has been using the earth’s resources more and more rapidly over the past years. Some of them are almost used up. Now many people believe that man’s greatest problem is how to control the growth of the population. The material supplies in the world will be far from enough to support the human population, in time to come, if the present rate of increase continues. Already there is overcrowding in many cities and starvation in some countries. Should man’s population keep on growing so rapidly as before? Many people believe that human survival in the future depends on the answer to this question.

59. The rapid increase in population is considered to be __________.

A. the increase of resources          B. population pollution

C. the development of mankind       D. the present rate

60. The world population will be _________ by the year 2,000.

A. 7 billion                  B. 250 million       C. 25 billion      D. 3.5 billion

61. If the present rate of increase continue, ________________.

A. the world is going to end

B. the earth won’t be able to support the growing population in the future

C. pollution has nothing to do with the rapidly increasing population

D. there would be four billion in the world a hundred years from now

62. Which of the following is WRONG according to the passage?

A. In 1850 the world population reached a billion.

B. Man must fight a battle against population pollution.

C. The world’s population is increasing with years.

D. All of the earth’s resources are gone now.

 

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    Macao is only forty miles from Hong Kong and it is easy to reach. You can get there by sea. It is an interesting place and it had a long history. Macao is part of China and most people living there are Chinese.

The first Europeans to go to Macao came from Portugal. More than four hundred years ago the Portuguese went there to trade with China. Some settled and made their homes there. They built strong forts to guard the city and the harbor. They also built churches, schools, hospitals and other places. Slowly the city grew. People from many countries came to live and work in Macao.

Today many people visit Macao. Some only go there to watch dog-racing or motor-racing or to gamble with their money. But Macao is a quiet and peaceful place. It is pleasant just to walk around and look at old buildings and forts. You feel you are back in the old days. Of course, some of the buildings are now in ruins. The Church of St. Paul has only the front wall with many steps leading up to it. But it is still interesting to see.

When you are hot and tired, there are small cool gardens to rest in. When you are hungry, there are good restaurants with many kinds of food. Nearby there are some islands, which are also nice and are easy to get to. There is certainly a lot to do in Macao.

56. You feel in Macao you are back in the old days because_________.

A. most of the buildings are now in ruins

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D. it is a peaceful place

57. Where will you have a break when you feel worn out?

A. In good restaurants.                                       B. In small cool gardens.

C. On some islands.                                                        D. In beautiful parks.

58. The main idea of this passage seems to be that_________.

A. people from many countries came to live and work in Macao

B. Portuguese were willing to do business in China

C. people in Macao serve good food

D. Macao is a quiet and peaceful place with a lot to see and to do

 

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Angels

My friend Heather mentioned that she had never seen an Angel. Then I remembered the 36  I had with my sister Sandra earlier this week.

This will be Sandra’s first Christmas without her husband. This summer he died in her arms. On Thursday, she was in the store  37  for an ideal card for her two sons and daughter. Time passed by quickly as she  38  the many choices. She wanted a card that sent something special to each of them,  39  she knew they would have a(n)  40  place in their heart this holiday season.

Finally! She found the one that expressed the  41 feeling. The words expressed the feelings that she wished to share. However, a sharp pain pierced(穿透) her heart when she realized that the card was  42 “mom and dad.” She stood there,  43  it close for a long time, unable to move from the  44  . Tears began to run down her cheeks.

“Is there something I can do for you?” a  45  voice asked. She  46  to face a stranger, a woman, who was looking at her with  47  and concern. “Uh…oh...OH!” Sandra responded, “I can’t give this card to my children because…because my husband died and this is the  48  card.”

Hearing this, the stranger’s face softened with sympathy(同情) and love. She reached out and 49  my sister into her arms, giving her unspoken permission to cry in the protection of her embrace(拥抱). She  50  held my sister until her calmness 51  . “Thank you for listening to me cry on,” was what my sister said when all was better. “You are welcome, and I am so sorry for your  52 ,” the stranger answered and said goodbye to her.

During her telling of this event I was feeling  53  that I hadn’t been there. My sister needed me and a stranger had to do my  54  .  “You know,” she went on, “a friend suggested that it was like meeting with an Angel.” My  55  disappeared in an instant. My sister required an Angel, and I think that is exactly what she got.

36.

A. conversation

B. difficulty

C. accident

D. quarrel

37.

A. paying

B. caring

C. calling

D. looking

38.

A. left

B. offered

C. read

D. discovered

39.

A. although

B. as

C. when

D. if

40.

A. other

B. empty

C. safe

D. different

41.

A. sad

B. strange

C. amazing

D. perfect

42.

A. for

B. to

C. from

D. by

43.

A. seizing

B. holding

C. keeping

D. grasping

44.

A. spot

B. stair

C. area

D. home

45.

A. firm

B. proud

C. cold

D. soft

46.

A. walked

B. turned

C. decided

D. woke

47.

A. question

B. shock

C. regret

D. upset

48.

A. harmful

B. special

C. wrong

D. right

49.

A. pulled

B. caught

C. sent

D. protected

50.

A. quietly

B. tightly

C. strongly

D. seriously

51.

A. disappeared

B. went

C. arrived

D. returned

52.

A. failure

B. idea

C. loss

D. death

53.

A. shocked

B. angry

C. happy

D. hopeless

54.

A. task

B. time

C. favor

D. job

55

A. responsibility

B. sympathy

C. guilt

D. hurt

 

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The students scored 100 ______ in the intelligence test, while John got 160.

A.on average

B.in total

C.in the middle

D.on the whole

 

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— The earthquake last night was really terrible.

— ______, no people were injured or killed, and they escaped in time.

A.Luckily

B.Hopefully

C.Sadly

D.Unfortunately

 

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