Walk through the Amazon rainforest today and you will find it is steamy, warm, damp and thick. But if you had been around 15,000 years ago, during the last ice age, would it have been the same ?For more than 30 years, scientists have been arguing about how rainforests like the Amazon might have reacted（反应）to the cold ,dry climates of the ice ages ,but until now ,no one has reached a satisfying answer.

       Rainforests like the Amazon are important for mopping up CO2 from the atmosphere and helping to slow global warming . Currently the trees in the Amazon take in around 500 million tons of CO₂ each year; equal to the total amount of CO2 giving off in the UK each year. But how will the Amazon react to future climate change? If it gets drier ,will it still survive and continue to draw down CO2 ?Scientists hope that they will be able to learn in advance how the rainforest will manage in the future by understanding how rainforests reacted to climate change in the past.

       Unfortunately ,getting into the Amazon rainforest and collecting information are very difficult .To study past climate ,scientists need to look at fossilized pollen ,kept in lake muds .Going back to the last ice age means drilling deep down into lake sediments （沉淀  物）,which requires specialized equipment and heavy machinery .There are very few roads and paths ,or places to land helicopters and aeroplanes .Rivers tend to be the easiest way to enter the forest ,but this still leaves vast areas between the rivers completely unsampled（未取样）.So far ,only a handful of cores have been drilled that go back to the last ice age and none of them provide enough information to prove how the Amazon rainforest reacts to climate change.

64．The underlined phrase “mopping up” in the second paragraph means      .

       A．cleaning up          B．taking in                 C．wiping out           D．giving out

65．How will the Amazon rainforest react to future climate change?

       A．It’ll get drier and continue to remove CO2 .

       B．It’ll remain steamy ,warm ,damp and thick .

       C．It’ll get warmer and then colder and drier.

       D．There is no exact answer up to present.

66．What’s the main idea of the last paragraph?

       A．It’s important to drill deep down into lake sediments to collect information.

       B．It’s impossible to prove how climate changes in the Amazon rainforest.

       C．It’s hard to collect information for studies of the past climate in the Amazon rainforest.

       D．It’s necessary to have specialized equipment and machinery to study the past climate.

67．The best title for this passage may probably be        .

       A．Studies of the Amazon                          B．Climates of the Amazon

       C．Secrets of the Rainforests                     D．Changes of the Rainforests

When did you last see a polar bear?On a trip to a zoo,perhaps?If you had attended a winter activity in New York a few years ago,you would have seen a whole polar bear club.These "Polar Bears" are people who meet frequently in the winter to swim in freezing cold water.That day,the air temperature was 3℃,and the water temperature was a little higher.The members of the Polar Bear Club at Coney Island,New York are usually about the age of 60.Members must satisfy two requirements.First,they must get along well with everyone else in the group;this is very important because there are so many different kinds of people in the club.Polar Bears must also agree to swim outdoors at least twice a month from November through February. 
Dcotors don't agree about the medical effects of cold-winter swimming.Some are worried about the dangers of a condition in which the body's temperature drops so low that finally the heart stops.Other doctors,however,point out that there is more danger of a heart attack during summer swimming because the difference between the air temperature and water temperature is much greater in summer than in winter. 
The Polar Bears themselves are satisfied with the benefits of cold-water swimming.They say that their favorite form of exercise is very good for the circulatory system(循环系统）because it forces the blood to move fast to keep the body warm.Cold-water swimmers usually turn bright red after a few minutes in the water.A person who turns blue probably has a very poor circulatory system and should not try cold-water swimming. 
The main benefits of cold-water swimming are probably mental.The Polar Bears love to swim all year round;they find it fun and relaxing.As one 70-year-old woman says,"When I go into water,I pour my troubles into the ocean and let them float away." 
【小题1】The members of the Polar Bear Club must meet the following requirements except that_____. 

A．they must swim outdoors at least 8 times in the four cold months

B．they must reach the age of 60

C．they should be easy to make friends with

D．they must agree to swim outdoors from November through February

【小题2】According to the passage,some doctors believe it is true that_____. 

A．Polar Bears are bears swimming in freezing water

B．cold-water swimming can make the body temperature dangerously high

C．you are healthy if cold-water swimming turns your skin color blue

D．cold-water swimming causes more heart attacks in summer than in winter

【小题3】The Polar Bears like to swim year-round,for_____. 

A．it is an easy way ot keep the body warm in winter	B．they can remain young
C．they find it enjoyable and interesting	D．they might meet fewer troubles in life

【小题4】The passage is mainly about_____. 

A．the requirements of the Polar Bear Club	B．a group of cold-water-swimming livers
C．the Polar Bears' life in New York	D．doctors' ideas about cold-water swimming

阅读理解

　　In what now seems like the prehistoric times of computer history，the earth's postwar era，there was quite a wide-spread concern that computers would take over the world from man one day． Already today，less than forty years later，as computers are relieving us of more and more of the routine tasks in business and in our personal lives，we are faced with a less dramatic but also less foreseen problem．People tend to be over-trusting of computers and are reluctant to challenge their authority．Indeed，they behave as if they were hardly aware that wrong buttons may be pushed，or that a computer may simply malfunction（失误）．

　　Obviously，there would be no point in investing in a computer if you had to check all its answers，but people should also rely on their own internal computers and check the ma-chine when they have the feeling that something has gone wrong．

　　Questioning and routine double-checks must continue to be as much a part of good

business as they were in pre-computer days．Maybe each computer may provide，it should

not be seen as a substitute for fundamental thinking and reasoning skills．

1．What is the main purpose of this passage？

[　　]

A．To look back to the early days of this passage．

B．To explain what technical problems may occur with computers．

C．To discourage unnecessary investment in computers．

D．To warn against a mentally lazy attitude towards computers．

2．According to the passages，the initial concern about computer was that they might

[　　]

A．change our personal lives

B．take control the world

C．create unforeseen problem

D．affect our businesses

3．The passage recommends those dealing with computers to________．

[　　]

A．he reasonably doubtful about them

B．check all their answers

C．substitute them for basic thinking

D．use them for business purposes only

4．The passage suggests that the present-day problem with regard to computers is________．

[　　]

Today anyone will accept money in exchange for goods and services. People use money to buy food, furniture, books, bicycles and hundreds of other things we need or want. When they work, they usually get paid in money.
Lots of the money today is made of paper. But people used to use all kinds of things as money. One of the first kinds of money was shells. Shells were not the only things used as money.
In China, cloth and knives were used. In the Philippine Islands, rice was used as money for  a long time. Some Africans once used elephant tusks, monkey tails, and salt as money.
The first metal coins were made in China. They were round and had a square hole in the center. Different countries have used different metals and designs for their money. Later, countries began to make coins of gold and silver.
But even gold and silver were inconvenient if you had to buy something expensive. Again the Chinese thought of a way to improve money. They began to use paper money. The first paper money looked more like a note from one person to another than the paper money used today.
Money has had an interesting history, from the days of shell money until today.
【小题1】 In the Philippines Islands ______ was once used as money.

A．rice

B．knife

C．cloth

D．wheat

【小题2】What was first used as money? ______.

A．Elephants tusks

B．Cloth

C．Salt

D．Shells

【小题3】The first metal coins looked like ______.

A．square-shaped with some designs on them

B．square-shaped with a round hole in the center

C．round-shaped with a square hole in the middle

D．round-shaped with a round hole in the middle

【小题4】The first paper money ______.

A．was passed from west Asia to China	B．looked like a note used today
C．was first used in Europe	D．looked like a piece of fur

【小题5】We can infer from the passage that ______.

A．paper money isn’t difficult to make

B．money must be suited to carry

C．people need money to exchange goods with each other

D．people prefer metal coins to paper notes

When did you last see a polar bear(北极熊）? On a trip to a zoo,perhaps?  If you had attended a winter activity in New York a few years ago,  you would have seen a whole polar bear club.  These "Polar Bears" are people who meet frequently in the winter to swim in freezing cold water.  That day, the air temperature was 3℃, and the water temperature was a little higher.  The members of the Polar Bear Club at Coney Island, New York are usually about the age of 60.  Members must satisfy two requirements.  First, they must get along well with everyone else in the group; this is very important because there are so many different kinds of people in the club.  Polar Bears must also agree to swim outdoors at least twice a month from November through February.

Doctors don't agree about the medical effects of cold-winter swimming.  Some are worried about the dangers of a condition in which the body's temperature drops so low that finally the heart stops.  Other doctors, however, point out that there is more danger of a heart attack during summer swimming because the difference between the air temperature and water temperature is much greater in summer than in winter.

The Polar Bears themselves are satisfied with the benefits of cold-water swimming.  They say that their favorite form of exercise is very good for the circulatory system(循环系统）because it forces the blood to move fast to keep the body warm.  Cold-water swimmers usually turn bright red after a few minutes in the water.  A person who turns blue probably has a very poor circulatory system and should not try cold-water swimming.

　　The main benefits of cold-water swimming are probably mental.The Polar Bears love to swim all year round;  they find it fun and relaxing.  As one 70-year-old woman says,"When I go into water, I pour my troubles into the ocean and let them float away."

The members of the Polar Bear Club must meet the following requirements except that_____.

A.they must swim outdoors at least 8 times in the four cold months

B.they must reach the age of 60

C.they should be easy to make friends with

D.they must agree to swim outdoors from November through February

According to the passage, some doctors believe it is true that_____.

A.Polar Bears are bears swimming in freezing water

B.cold-water swimming can make the body temperature dangerously high

C.you are healthy if cold-water swimming turns your skin color blue

D.cold-water swimming causes more heart attacks in summer than in winter

The Polar Bears like to swim year-round, for_____.

A.it is an easy way to keep the body warm in winter          B.they can remain young

C.they find it enjoyable and interesting        D.they might meet fewer troubles in life

The passage is mainly about_____.

A.the requirements of the Polar Bear Club         

B. a group of cold-water-swimming livers

C.the Polar Bears' life in New York            

D. doctors' ideas about cold-water swimming