There are new findings that not enough sleep may cause people to gain weight. Researchers say a lack of sleep can produce hormonal changes that increase feelings of hunger. In one study, researchers in the United States examined information on more than 1000 people. The people had taken part in a long-term study of sleep disorders. Some people slept less than five hours a night. They had 15 percent higher blood levels of a hormone called ghrelin than people who slept eight hours. And they had 15 percent less of the hormone leptin. Experts say ghrelin helps make people feel hungry; leptin makes you feel full. The scientists say these hormonal changes may be a cause of obesity in Western societies. They note the combination that sleep limitation is common and food is widely available. The results were not affected by how much people exercised. People who are awake longer have more time to burn energy. But the researchers say loss of sleep may increase hunger especially for high-calorie foods, so people gain weight. It seems that, for survival, the body may be designed to store more fat during times with less sleep. Researchers from Stanford University in California and the University of Wisconsin did the study. They found that the best amount of sleep for weight control is 7.7 hours a night.The Public Library of Science published the findings in its journal Medicine . Internet users can read the full study, free of charge, at plos. org. Not enough sleep can cause obesity by _ . A) burning more of your energy B) making you want to eat more food C) keeping you from doing exercise D) helping you feel great without food
B
Many people think prefix = st1 /Casablanca is one of the best movies ever made. It was filmed in 1942, during the Second World War, and starred Humphrey Bogart as Rick, and Ingrid Bergman as Ilsa. The movie is set in Casablanca, a place the Germans hope to take from the French. Rick owns a bar there. In the movie, the German army is coming towardsCasablanca. People who live there are trying to escape before they arrive. Rick has two tickets for the last plane out ofCasablanca. His former lover Ilsa arrives inCasablancawith her husband Victor Lazlo. Lazlo is a leader in a secret group, and his escape will help win the war againstGermany. Rick decides to give his tickets to Ilsa and Lazlo rather than use them himself. Rick really loves Ilsa, but he knows that it is more important for Lazlo to get out ofCasablanca. Rick is a very tough character but he is not selfish. He is very good to people who need his help. Some famous lines from the movie are, "Here's looking at you, kid." and "This could be the beginning of a beautiful friendship." Many people think that the line, "Play it again, Sam." is in the movie. Actually, the line is "Play it, Sam." Both Rick and Ilsa ask the piano player, Sam, to play the song,As Time Goes By. It was originally recorded in 1931 and became very popular because of this movie. The movie was filmed almost entirely in the Warner Brothers film studios in Hollywood, using special effects. It won several Academy awards and is well worth seeing. If you've already seen it, see it again, Sam! What is the best title of the text? A) Review ofCasablanca B) Famous lines inCasablanca C) A moving movie D) A war film
A
Q: A few common misconceptions. Beauty is only skin-deep. One' s physical assets and liabilities don' t count all that much in a managerial career. A woman should always try to look her best. Over the last 30 years, social scientists have conducted more than 1,000 studies of how we react to beautiful and not- so-beautiful people. The virtually unanimous conclusion: Looks do matter, more than most of us realize. The data suggest, for example, the physically attractive individuals are more likely to be treated well by their parents, sought out as friends, and pursued romantically. With the possible exception of women seeking managerial jobs they are also more likely to be hired, paid well, and promoted. Un-American, you say, unfair and extremely unbelievable? Once again, the scientists have caught us mouthing pieties while acting just the contrary. Their typical experiment works something like this. They give each member of a group--college students, perhaps, or teachers or corporate personnel managers a piece of paper relating an individual' s accomplishments. Attached to the paper is a photograph. While the papers all say exactly the same thing the pictures are different. Some show a strikingly attractive person, some an average-looking character, and some an unusually unattractive human being. Group members are asked to rate the individual on certain attributes, anything from personal warmth to the likelihood that he or she will be promoted. Almost invariably, the better looking the person in the picture, the higher the person is rated. In the phrase, borrowed from Sappho, that the social scientists use to sum up the common perception, what is beautiful is good. In business, however, good looks cut both ways for women, and deeper than for men. A Utah State University professor, who is an authority on the subject, explains: In terms of their careers, the impact of physical attractiveness on males is only modest. But its potential impact on females can be tremendous, making it easier, for example, for the more... The result of research carried out by social scientists show that _ . A) people do not realize the importance of looking one' s best B) women in pursuit of managerial jobs are not likely to be paid well C) good -looking women aspire to managerial positions D) attractive people generally have an advantage over those who are not
A: D
*Question*
My son Paul got a job in a large chain of guitar stores. It was the first time for him to do such a job. The pay was based on a small salary and his sales. They offered him some training on how to get close to a customer, introduce the product and make the sale. However, he wasn't doing well. He was very _ . One morning Paul said to me, "Mum, you used to be a sales trainer. Can you tell me why I'm not doing well?" I said, "The key is that you must love the people you are selling your product to, not count the money you will make in your mind. Do what is best for them even though they are just buying something small or a cheap guitar." He promised he would try it. After some time, his sales began to increase. He became the top salesman in the store and his salary was increased. Within six months, he was one of the top ten salespeople in the whole chains of guitar stores around the country. His company held a big party to honor the top ten salespeople. New cars, great hotels and delicious dinners were the prizes. Paul was of course included. After the dinner, the boss of the company asked, "Paul, how did you make it?" Paul answered, " I don't want to tell you. You won't believe me." "Of course I'll believe you. Tell me." "I started loving the people who came in," Paul told him. The boss replied, "Okay Paul, now tell me how you REALLY make it." The passage mainly tells us _ . A) why Paul was not doing his job well B) how difficult Paul's job as a salesman was C) the big influence of Paul's mother on him D) the story of Paul's becoming a successful salesman
**Answer**
D