Article: On a cool summer night in Wyoming, Dean Biggins waits patiently in his truck. Suddenly, Biggins, a wildlife biologist, spots a pair of eyes in the distance. Baggins can't believe his luck: He's just caught sight of a black-footed ferret --one of the world's rarest animals. Just over a century ago, hundreds of thousands of black-footed ferrets lived on the grasslands in North America known as the prairie. But the animals died off as prairie dog disappeared. Black-footed ferret depend on prairie dogs for both food and shelter. After a ferret has eaten a prairie dog, it moves into the animal's burrow . When cattlemen started setting up ranches on the prairie in the early 1900s, they thought prairie dogs, which eat grass, might compete with their cattle and sheep for food. To make sure that didn't happen, they killed off billions of prairie dogs. As prairie dog populations dropped, black-footed ferrets disappeared. By 1979, researchers couldn't find any ferrets and declared the species extinct. Then, two years later, a small group was discovered. Although scientists were excited about the discovery, it soon became clear that the ferrets were in danger. A disease called sylvatic plague was killing the ferrets. Soon, just 18 ferrets remained. "To help the species survive, the researchers put all the ferrets in cages in 1986 and began raising them," says Randy Matchett, a wildlife biologist. To help the black-footed ferrets learn survival skills, wildlife biologists put them through a process called preconditioning. Researchers build a fence around old prairie dog burrows and put the ferrets in them when they are a couple of months old. While the animals get used to their new home, researchers feed them live prairie dogs so they can practice hunting. "Now about 1,000 black-footed ferrets are back in the wild. Despite their amazing comeback, black-footed ferrets aren't out of the woods yet," says Matchett. Sylvatic plague is still a threat, and ranchers still don't want too many prairie dogs on their land. "We... Question: Black-footed ferrets once became extinct mainly because _ . Yes or no, is the answer "they lacked food"?
Yes

(Question)
Article: Most of the flowers in nature are red, orange and yellow. If we have seen a black flower, it's a chance in million. People have made a census ( ) to colors of more than four thousand kinds of flowers and discovered that only eight of them are black. As we know, sunlight is formed by seven different colored lights. The wave length of each light is different, so the quantity of heat in each light is also different. Flowers, especially their petals ( ) , are easy to be harmed by high temperature. Black flowers can take in all the light waves which cause the flowers to dry up in a high temperature. So black flowers can rarely survive sunlight. But red flowers, orange flowers and yellow flowers can protect themselves from sunlight by reflecting the red light, orange light and yellow light, each of which has a large quantity of heat. Question: The passage tells us that _ . Yes or no, is the answer "black flowers can take in the light of all the wave lengths which make them dry up because of high temperature."?
(Answer)
No

Ques: Article: Being able to count at least ten people as friends makes us happy, but those with five or fewer are likely to be miserable, researchers say. Their study of hundreds of men and women also found t hat people who feel satisfied with their lives always have lots of close friends and regularly make new ones. While it is not clear whether our friends make us happy or we make friends because we are happy, the researchers say it is clear that we should maintain our friendships. Psychologist RichardTunney said, "Whatever the reason is, actively working on friendships in the same way as to maintain a marriage is a prerequisite to happiness. "Dr. Tunney, of Nottingham University, quizzed more than 1,700 people about their satisfaction with their lives and the state of their friendships. Those with five friends or fewer had just a 40 percent chance of being happy. In other words they were more likely to be unhappy than happy. Ten was the first number at which people were more likely to be happy than unhappy. The happiest people were those with dozens of friends, according to the study, which was carried out for the National Lottery . For women, this meant having 33 friends;for men, the number was 49. Dr. Tunney said,"People who were extremely satisfied with their lives had twice the number of friends of people who were extremely dissatisfied. " Women tended to have fewer friends than men but formed tighter relationships. Interestingly, the study found that childhood friends are no more likely to make us happy than people we become close to later in life. Lottery winners, however, have a differentopinion on life. They are always happier than others despite spending their time with asmall circle of old friends. This could be because they trust people they've known for along time. Question: We can conclude from the passage that _ . Yes or no, is the answer "friendships play a major role in people's life"?
Ans: No

Ques:Article: Teenagers who do not get enough of the nutrients commonly found in fruits and fish are easier to have bad lungs, coughing and wheezing .Teens who eat the least of fruit and especially vitamin C have weaker lungs compared to the others. Teens who take in less vitamin E, found in vegetable oil and nuts, are more likely to have asthma , Jane Bums at the Harvard School of Public Health found. Based on these findings.Bums said that current recommended dose of vitamin C, 85 mg a day, may not be enough for teens to have healthy lungs.Teens who eat less fruit and don't take in enough fatty acids are more likely to have asthma and the signs of breathing difficulty. Proper amounts of fatty acids are protective, Bums said, though fish, the best source of fatty acids, is particularly unpopular with teenagers.Fatty acids are also found in some nuts as well as some green vegetables'.Smokers who avoid vitamin C will increase their chances of coughing, wheezing and developing phlegm . More than 80 percent of teens are getting their recommended doses of vitamin C - mainly from fruit drinks."I wouldn't approve of drinking them, but at least they're getting their vitamin C from somewhere," Burns said. Burns added that there are several different ways to get the necessary nutrients."I think vitamin supplements are fine.I think adding vitamin D to orange juice is fine.But I do think there are added benefits that we don't fully understand of eating whole foods like fruits and vegetables and fish," she said.The researchers did not account for poverty and other factors that often distinguish less-healthy eaters and may explain their findings. Question: Which of the following is NOT mentioned by the researchers in the passage? Yes or no, is the answer "Whether poor teens can prove their findings."?

Ans:
Yes