When did you 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 degrees. 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-water swimming. Some are worried about the dangers of a condition in which the body's temperature drops so slow 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 the water tempreature 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 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 could not try cold-water swimming. The main benefits of cold-water swimming are probably mental. The Polar Bears love to swim all the 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." This passage is mainly about _ . A) the requirements of the Polar Bear Club B) a group of cold-water-swimming lovers C) the Polar Bears' life in New York D) doctors' ideas about cold-water swimming
B
Strange things happen when you travel, because the earth is divided into twenty-four zones. The time difference between two zones is one hour. You can have days with more than twenty-four hours and days with fewer than twenty- four hours. You can have weeks with more than seven days and weeks with fewer than seven days. If you make a five-trip across the Atlantic Ocean , your ship come into a different time zone every day. As you come into each zone, the time changes one hour. If you travel west, you set your watch back. If you travel east, you set it ahead. Each day of your trip has either twenty-five or twenty-three hours. If you make a trip by ship across the Pacific Ocean , you cross the International Date Line. This is the point where a new day begins when you cross the line, you change one full day. If you travel east, today becomes yesterday, if you travel west it is tomorrow. Something interesting will happen to the time if you travel because_. A) a day has always fewer than twenty-four hours B) a day has always more than twenty- four hours C) a day has more or fewer than twenty-four hours, D) some time zones are large and some time zones are small
C
Q: All work and no play makes Jack a dull boy. That saying holds true not only for you and me, but also for some of the most powerful and influential people in the world, such as the presidents of the United States. But how do American presidents spend their vacation time? Let's take a look! Franklin D. Roosevelt, considered one of the greatest presidents in American history, had limited vacation options because of his polio . He began visiting Warm Springs, Georgia in 1924 for its curative waters and later built a 2,000 acre polio treatment center nearby. He liked to cruise the Potomacon his yacht and three times as president returned to his beloved Canadian island of Campobello, with which he fell in love as a kid. Former President Bill Clinton, however, was never much good at vacationing. His staff had to practically force him to go on vacation his first year in office; his idea of relaxing was reading four good books simultaneously while enjoying a cigar (chewed, not smoked). He could also lose himself in a game of golf, where his somewhat flexible interpretation of the rules could at times drive his partners crazy. Obama's predecessor also knows how to relax. Fishing is in the Bush family DNA: for blue sharks off the coast of Maine or anything with fins, almost anywhere else. George W. Bush also relaxed as president by jogging and clearing brush on his Texas ranch. Since leaving office, he has become an active mountain biker and, more recently, has taken up painting. Obama tends to take a winter break in Hawaii, where he was born and raised, and a summer vacation in Martha's Vineyard, off the southern coast of Cape Cod, Massachusetts. In between, he plays basketball every couple of weeks and has been known to do some skeet shooting at Camp David. Obama's favorite pastime, no matter the location, has become easy to spot: golf. What's special when Bill Clinton was playing golf? A) He could often be the top player. B) He could often be the bottom player. C) He did not often respect the rules. D) He usually showed good team spirit.
A: C
(Q).
The year is 2094. It has been announced that a comet is heading towards the Earth . Most of it will miss our planet, but two pieces will probably hit the southern half of the Earth. On 17 July , a piece four kilometers wide enters the Earth's atmosphere with a massive explosion . About half of the piece is destroyed, but the remaining part hits the South Atlantic at 200 times the speed of sound. The sea boils and a huge hole is made in the sea bed. Huge waves are created and spread outwards from the hole. The wall of water, a kilometer high, rushes towards southern Africa at 800 kilometers an hour. Cities on the African coast are totally destroyed and millions of people are drowned. Before the waves reach South America, the second piece of the comet lands in Argentina. Earthquakes and volcanoes are set off in the Andes Mountains. The shock waves move north into California and all around the Pacific Ocean. The cities of Los Angeles, San Francisco and Tokyo are completely destroyed by earthquakes. Millions of people in the southern half of the earth are already dead, but the north won't escape for long. Because of the explosions, the sun is hidden by clouds of dust, temperatures around the world fall to almost zero .Crops are ruined. The sun won't be seen again for many years. Wars break out as countries fight for food. A year later, no more than 10 million people remain alive. Could it really happen? In fact, it has already happened more than once in the history of the Earth. The dinosaurs were on the Earth for over 160 million years. Then 65 million years ago they suddenly disappeared. Many scientists believe that the Earth was hit by a piece of object in space. The dinosaurs couldn't live through the cold climate that followed and they died out. Will we meet the same and? Why can't the northern half of the earth escape for long? A) Because the land is covered with water B) Because the light and heat from the sun can not reach the earth. C) Because people there can not live at the temperature of zero. D) Because wars break out among countries.
(A).
B