Read the article and select the best answer. Article: China is known as a state of manners and ceremony . Many proverbs have been passed down from generation to generation such as "Polite behavior costs nothing" or "Showing respect demands reciprocity " and so on. For instance, there is an interesting short story. Once upon a time, a man went on a long tour to visit his friend with a swan as a gift. But it escaped from the cage on the way. Though he tried hard, he got hold of nothing but a feather . Instead of returning home, he continued his journey with the swan feather. When his friend received this unexpected gift, he was deeply moved. And the saying "The gift is nothing much, but it's the thought that counts." was spread far and wide. Chinese used to cup one hand in the other before the chest as a greeting. This tradition has a history of more than 2, 000 years and nowadays it is seldom used except in the Spring Festival. And shaking hands is more popular on some formal occasions. Bowing, as to show respect to the higher level, is often used by the lower like subordinates , students, and attendants . But at present Chinese youngsters prefer to simply nod as a greeting. In a way, this development shows the ever-increasing pace of modern life. It is common social practice to introduce the junior to the senior, or the familiar to the unfamiliar. When you start a talk with a stranger, the topics such as weather, food, or hobbies may be good choices to break the ice. For a man, a chat about current affairs , sports, stock market or his job can usually go on smoothly. Similar to Western customs, you should be careful to ask a woman private questions. However, relaxing talks about her job or family life will never put you into danger. She is usually glad to offer you some advice on how to cook Chinese food or get used to local life. Things will be quite different when you've gotten to know them. Though Chinese are said to be implicit , they are actually humorous enough to be pleased about the jokes of Americans. Question: The passage is mainly about _ . Options: A: Chinese proverbs B: Chinese humour C: Chinese manners D: Chinese languages
C

Read the article and select the best answer. Article: Before 1900, many theories existed as to the cause of yellow fever . Some doctors were sure the disease was air-borne; others felt that it was spread from person to person. Dr. Carlos Finlay, a well-known Cuban doctor of that time, had long held the theory that it was caused by the bite of mosquitoes. But neither the public nor the doctors then accepted his idea. Walter Reed,all American doctor sent to study yellow fever in Cuba,went to talk with Finlay.Reed,after reading a lot on the subject,had begun to think that Dr.Finlay might be fight.Then Reed and his comrades set to work at once.Outside Havana,they set up a laboratory and began experiments to test the theory.The experiments were successful.Now we know:A period of about two weeks must pass before a mosquito,after feeding on a sick person,could infect another person.The sick person had to have yellow fever a certain number of days before the mosquito biting him was able to carry the disease. Question: Before 1900,many people didn't think yellow fever was spread _ . Options: A: by air B: by dirty water C: by the bite of certain mosquitoes D: by getting in touch with the patient
C

Read the article and select the best answer. Article: Tracy Caulkins is known as the first American to set an American record and win an American title in each of four swimming strokes : breaststroke, butterfly, backstroke, freestyle. Tracy Caulkins was born in Minnesota and lived in Iowa until she was six. She began swimming when she was eight, after the family had moved to Nashville, Tennessee. While unwilling at first to swim in cold water or get her face wet, she began to train in earnest as her talent became clear. Though her father worked for the public schools, the family sent her to a private school when the public schools could not accommodate her training schedule. At age 13, Tracy Caulkins took part in the trials for the 1976 Olympics, but did not make the team. She continued to win national and international titles, and was disappointed in 1980 when the U.S. didn't attend the Moscow Olympics. She continued to train and compete. In 1981, Tracy Caulkins began college, graduating in 1985. In college, she continued competing and training, though she had slowed down from her peak years. Caulkins trained especially hard for the 1984 Olympics, and not only made the team, but was captain of the swim team and at Los Angeles, won three gold medals and was named Sportswoman of the Year by the U.S. Olympic Committee. After that she retired from swimming, and was a commentator for swimming events as well as taking advantage of her fame to do business. Tracy Caulkins married Australian swimmer, Mark Stockwell, in 1991, their romance having begun at the 1984 Olympics when he jumped into a warm-up pool to introduce himself. They married in Nashville and moved to Australia, where they had three children. Caulkins continued to be professionally involved in sports. Question: When was Tracy Caulkins born? Options: A: In 1963 B: In 1953 C: In 1960 D: Not mentioned
D

Read the article and select the best answer. Article: . As the world's largest terrestrial carnivore ,the polar bear is the king of the great white north. Adult males can measure more than 9 feet in length and weigh between 770 and 1,430 pounds. The bear's body and neck are elongated, and the head is narrow and long with small, rounded ears. Polar bear populations can be found in northern Canada, Greenland, Norway and Russia, and there have been reports that polar bear tracks have been found as far north as the North Pole. The 5,000,000-square-mile range of the polar bear circles the Arctic and contains stretches of open water where seals are easily caught. Polar bears live on the annual Arctic sea ice that provides a platform from which they can hunt. They hunt seals on the sea ice by breaking into seal dens in the sea ice. The dens aren't visible from above,but seeing is less important than smelling to a polar bear -- with their keen sense of smell,polar bears can sense the breathing holes of seals in their dens beneath the snow and ice. As the southern edge of the Arctic ice cap melts in summer, polar bears are stranded on land and spend their summers fasting ,living off body fat stored from hunting in spring and winter. It might come as a surprise that this species faces an uncertain future. Climate change is causing the disappearance of sea ice from which polar bears hunt seals. Sea ice in the Arctic is melting earlier and forming later each year. With about 22,000 polar bears living in the wild,the species is not endangered at the moment, but its future is far from certain. People have reached an agreement that controls the hunting of polar bears and directs each nation to protect their habitats, but it does not protect the bears against the biggest man-made threat to their survival : global warming. If current warming trends continue, scientists believe that polar bears may disappear within 100 years. Question: Polar bears search for seals mainly through their _ . Options: A: eyes B: ears C: noses D: necks
C