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 limitation is common and 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. Which of the following shows the right way in which lack of sleep causes weight gain? A) more ghrelin and less leptin-feeling hungry-eating more B) feeling hungry-eating more-more ghrelin and less leptin C) burning more energy-feeling hungry-eating more D) more leptin and less ghrelin-feeling full-less exercise
A

BEIJING--Alarmed by the overreaching ambitions of many Chinese provinces to grow at all costs, China's top economic chief is calling on officials to calm down and spare a thought for the environment. Zhang Ping, who heads China's National Development and Reform Commission, the central economic planning agency, said only five or six of China's 30 provinces are targeting annual economic growth of 8 percent or 9 percent. The remaining provinces are aiming for growth rates of more than 10 percent this year, with some wanting to double economic output in the coming five years. "China has a planned energy supply of about 4 billion cubic tons of coal equivalent for the next five years, and this is not enough to meet demands for economic growth to double," he was quoted as saying on the news portal Sina.Com. Beijing is increasingly concerned with the ambitions of Chinese provinces across the country to chase high growth despite the central government's urgent request for a more moderate and sustainable pace of expansion. Years of rapid economic growth has China's environment, with Beijing trying to remove some of the damage now.It has an annual growth target of 7 percent for the next five years, well down from last year's 10 percent. Zhang said Beijing has asked local governments to take into account the supply of "energy, environment, water and land" to set more reasonable growth targets. What could be the best title for the news? A) Economic Development B) Energy Supply C) Sustainable Development D) Environment protection
C

Dealing with a difficult roommate can be both annoying and challenging. However, by becoming aware of the context of the situation, steps can be taken in order to improve the circumstance. Identify the source of the problem. Sometimes, when someone is annoying, it is difficult to tell exactly which aspect of the situation is causing the anger. Therefore, it is important to find the one element that caused your anger to begin with. Evaluate the source of the conflict. Is the conflict _ , or is it serious ? Sometimes, people can become angry over things that seem like a big deal at the time, but when contemplated  , are really unimportant. Nevertheless, before any problem is dealt with, it is necessary to determine how serious it is. Talk to the roommate about what is bothering you. Communication is very important when dealing with problems. The problems will only become worse if measures are taken without telling one another what is even wrong to begin with. Listen to the explanation that the roommate has to over. Listening is also important when dealing with conflicts. Hearing each side of the story will make it easier to arrive at a possible solution. Compromise with one another in order to form a solution. Sometimes, conflicts can be resolved simply by changing small occurrences. We can find the text in the  _  section of a newspaper. A) science. B) relationship. C) recreation. D) education.

B