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." 

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

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

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

4.The passage is mainly about_____. 

Extract（摘要）1 

A computer is an "information processor".It is given information,called "data",instructed to do certain things and then show us the results.The data put into the computer is called the"input" and the results which come out are the "output".Some people say the circle of large standing stones at Stonechenge is a kind of computer.Prehistory people worked out their calendar（日历）from the position of the shadows made by the sun shining on the stones. 

Extract 2 

Teach yourself new subjects and skills at your own pace with a home computer.Use it to help with schoolwork,for self-improvement,even to improve your career skills.Learn touchtyping.  Foreign languages or computer programming.A home computer can help children of all ages learn classroom subjects such as spelling,geography and others.In fact it makes learning fun.So if you want to teach yourself,or help your children teach themselves-get a home computer.It can also help you manage your personal finances or help you to work taxes and plan household budgets.You can make business a pleasure with a home computer. 

1.The writer introduces the words such as "input" and "output" in order to_____. 

2.Why does the writer talk about Stonechenge in Extract 1?

3.If you think of the circle of large standing stones as a computer,_____. 

4.Extract 2 is probably taken from_____.

Moscow,Russia(Space news)-"The computer is a better chess player,"insisted Viktor Prozorov,the loser(失败者)." It seemed as if it were laughing after every good move.I know I should have beaten it for the sake of mankind(为人类着想），but I just couldn't win," he announced and shook his head sadly. 

Prozorov's disappointment was shared by several grand masters who were present,some of whom were so upset that they shouted at the machine.Many chess players said that this meant the end of chess championships around the world,since the fun had been taken out of the game. 

The computer walked－or rather,rolled-away with 5,000 dollars in prize money and limited its remarks to a set of noises and light. 

1.Which of the following best gives the main idea of this newspaper article? 

2.What was it that Prozorov felt most bitter(懊恼)about? 

3.After winning the game,the computer_____.

4.Many chess players felt that playing with a computer would_____. 

I spent two months with an American family last year when I studied in America．It is said that “The best house is in the U.S.A．， the best wife is in Japan and the best food is in China．”So I took 36    and pleasure to   37    “the best food” for my American family．Each day，regardless of my poor skill of cooking，I performed my play in  38   way：changing the dishes’colour，the meat’s type or the soup’s style．Thus，my American friends could discover the    39   of eating Chinese food． Because of my“      40    ” job，I was often rewarded by their    41  of  appreciation , such as “very  tasty”，“excellent”etc．But the joke was here： yesterday， I cooked Sichuan－style    42  for dinner．I was   43   at my achievement．When all the family members arrived at the table，they first looked     44  at the fish，then looked at me． “Why do all the fish have their    45   ？” they asked，“It’s horrible！” Horrible or beautiful？ I don’t know． But I    46  know that fish heads are delicious. The    47   is the best part of fish； in    48    only the respectable guest can have the special     49  of enjoying it． Another                      50     thing is：the American friends often said to me“    51 ”as they  52   fruits or other things． According to Chinese tradition，I would simply smile in answer to their kindness 53 actually helping myself to any of the food.     54  ，I said “help yourself” to them whenever I brought home fruits．Dear me，no matter how much or how often I brought home food， as long as it was nice to their taste，they    55  hesitated to use their hands to “help themselves” until all was finished． 

—Why is he feeling disappointed today?

—Because the suggestion he       has been turned down.

What a mess！Tom，I have told you over and over again not to leave everything       .

It shows that a knowledge of first aid can make a real       .

The cool water stops the burning process，prevents the pain       unbearable and reduces swelling.

Burns are called first，second or third degree burns，       which layers of the skin are burned.

First aid is a temporary form of help       to someone who suddenly falls ill or gets       ——before a doctor can be found.