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 winter to swim in freezing cold

When did you move to America?（）AThree years ago.BAbout three years.CNext year.DThis year

单选题What's the mission of Polar Bears International?A Saving energy.B Conducting scientific research.C Seeking international cooperation.D Saving polar bears and their home.

问答题Polar bears have thick fur, big paws and other features that make them well prepared for life in their tough environment.

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 winter to swim in freezing cold water.That day,the air temperature was 3oC,and the water temperature was a bit 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 do not agree about the medical effects of cold-water 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（or advantages）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（or advantages）of cold-water swimming are probably mental.The Polar Bears love to swim year-round;they find it fun and relaxing.As one 70-year-old woman says,"When I go into the water,I pour my troubles into the ocean and let them float away."DoctorsA.encourage people to take part in cold-water swimming actively B.point out the possible danger of blood illness during cold-water swimming C.believe swimming is helpful both in winter and in summer D.have different ideas about the medical effects of cold-water swimming

—I can't see the words on the blackboard. —Perhaps you need _( )A. How long ago did you get it thisB. How long have you been like thisC. How soon have you got itD. How soon have you liked this

单选题According to the passage, which of the following statements is TRUE?A Starving polar bears are increasingly coming into villages, where they may be killed either for food or safety.B Polar bears can spend their entire lives on land if the sea ice melts completely.C Two-thirds of the world's polar bears may disappear by 2050 as global warming continues.D The growing distance between ice packs is not a problem for polar bears, because they are excellent swimmers.

单选题—I thought you were going to call on me last night.　　—Sorry, I would have, ______A but I had to finish my homeworkB but 1 would call you as soon as possibleC I thought you were thereD you would have taken me there

单选题In polar regions you should NOT expect to see（）.A mirage effectsB sea smokeC extensive snowfallD false horizons

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 winter to swim in freezing cold water.That day,the air temperature was 3oC,and the water temperature was a bit 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 do not agree about the medical effects of cold-water 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（or advantages）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（or advantages）of cold-water swimming are probably mental.The Polar Bears love to swim year-round;they find it fun and relaxing.As one 70-year-old woman says,"When I go into the water,I pour my troubles into the ocean and let them float away."According to the passage,some doctors believe it is true thatA.you are healthy if cold-water swimming turns your skin color blue B.cold-water swimming causes more heart attacks in summer than in winter C.cold-water swimming can make the body temperature dangerously high D.Polar Bears are bears swimming in freezing water

In polar regions you should NOT expect to see ______.A.mirage effectsB.sea smokeC.extensive snowfallD.false horizons

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 peopl

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