Read the article and select the best answer. Article: Ever wonder why sometimes a hug is all you need ? You can't explain it , but there's just something comforting about being in your wife's arms after a rough day or giving mom a hug after a long time apart . A new study says the warm feeling in a hug is more than just skin deep . Researchers from the University of California , Berkeley believe that this loving feeling could have anti-aging benefits . Oxytocin , sometimes referred to as the " love hormone " or the " trust hormone , " is responsible for those indescribable feelings we get when we're bonding with a lover or a loved one . Levels of the hormone drop as we age , and evidence suggests that could be a contributing factor to the _ of our bodies as we age . Muscle loss in particular is one of the major side effects of aging , with our bodies losing up to 5 percent of our muscle mass each decade past our 30s . In the study , published in the journal Nature Communications , researchers injected oxytocin into older mice with muscle damage . The older mice had lower levels of the homeone than younger mice initially . But after nine days , the older mice who were given the hormone healed better than those who did not . In fact , their ability to repair muscle damage was up to 80 percent that of the younger mice . The results were not only fast-acting , but provide hope for future uses of the hormone in a variety of anti-aging capacities . " This is good because it demonstrates that extra oxytocin improves aged tissue stem cells without making muscle stem cells divide uncontrollably , " study co-author Wendy Cousins said in a statement . Previous uses of anti-aging molecules have also been associated with higher cancer risk , but researchers are hopeful that oxytocin can be useful in humans without this risk . In the future , researchers of Berkeley say oxytocin could be used to fight other age-related health issues by improving bone health and even being used as an alternative to hormone replacement therapy . Now go out and give someone a hug . Question: What can be a suitable title for the passage ? Options: A: When Do We Need A Hug ? B: A New Anti-aging Product C: Hugs Having Healing Power D: How Can We Grow Muscles ?
C

Read the article and select the best answer. Article: Ever since Canadian psychiatrist Michael R. Phillips, who works in China, released his report saying China's suicide rate from 1995 to 1999 reached 0.023 percent, the country has been ranked among those with the highest suicide rates in the world. But Jing Jun, a professor of sociology in Tsinghua University, challenges that view and presents the true picture through his nationwide research. Jing and his students took one year to set up the first national database on suicide rate to grasp the overall trend of suicides in China. They collected data from the Health Statistics Annuals of the World Health Organization (sample size 10 million), and the country's Health Statistics Annuals (which cover 100 million people). The database covers 23 years, from 1987 to 2009. Jing calculates the suicide rate in China based on these data. Though the suicide rate was comparatively high in the early years, his study shows it has dropped in recent years, as opposed to the ascending trend in the rest of the world. According to Jing's calculation, China's suicide rate had dropped to about 0.01 percent in 2004. In 2009, the figure dropped further to 0.007 percent, which is rather low compared with the global rate of 0.016 percent. Even if the "missing" suicides were added, China's suicide rate in 2009 would still be below 0.008 percent.[:Zxxk.Com] Jing has found that one of the main reasons why the suicide rate has dropped was the steady and big decline in the number of suicides committed by rural women. In the early years, researchers generally agreed that the suicide rate among Chinese women was higher than among men, which is pretty rare in the rest the world. But the suicide rate among Chinese women, especially in rural areas, has declined remarkably in recent years. In fact, it is almost equal to that of Chinese men. As a sociologist, Jing regards suicide as a social issue, and believes improvement of social policies will reduce the suicide rate even further. More people's lives can be saved if the authorities adjust to... Question: In Jing's opinion, what should be done to reduce the suicide? Options: A: Pay more attention to rural women. B: Continue to improve social environment. C: Set up more mental health centers. D: Make policies to prevent suicides.
B

Q: Read the article and select the best answer. Article: Has this happened to you? You're about to drift off to sleep when suddenly you feel like you're falling or coming down on a roller coaster. You then wake up to realize that you're safe in your bed. You may have been confused or frightened for a second or two and your heart may be beating faster. You may have also felt the muscles in your body jerk when this all happened. Did you ever wonder why? This falling sensation, together with a body movement known as a "sleep start", is what doctors and scientists call a myoclonic jerk, and it usually happens right before going into deeper stages of sleep. Here's why doctors think the falling feeling and myoclonic jerks happen. When you fall asleep, normally your body temperature goes down and your heart start to beat just a little slower. This is because your brain signals your body to relax to prepare for sleep. When your muscles are relaxed, you go into the very first stages of sleep, but you're not sleeping too deeply yet. This brain activity may cause your larger muscles to contract a little bit. In response, another part of your brain will make up a very quick mini-dream to go along with _ . You might think this would take a while, but your brain works so fast that it makes up the story almost at the same instant that your muscles jerk. During this light sleep, you can be awakened easily. People who wake up during this light sleep believe they haven't fallen asleep yet. That's why you may think that your body jerked right before you were about to fall asleep. Myoclonic jerk are a normal part of sleep. Most people have them at one time or another. But many people don't realize their muscles are jerking during night sleep if it doesn't wake them up. So the next time you dream about falling and wake up in a sweat, don't worry! Your body is just telling your muscles to relax and get some rest! Question: People sometimes wake up during a light sleep because _ . Options: A: they are disturbed by others. B: they are too tired to fall asleep. C: their bodies are preparing for sleep. D: they believe their lives are in danger.
A: C

*Question*
Read the article and select the best answer. Article: Scientists around the world have been studying the warming of waters in the Pacific Ocean known as El Nino . The appearance of El Nino is known to affect the weather around the world. Scientists still do not completely understand it. Yet they now find they can use it to tell about the future in different areas of the world. One example is the work of two scientists at Columbia University in New York, Mark Cane and Gordon Eshel. A scientist of Zimbabwe , Roger Buckland worked with them. They have found that when El Nino appears, Zimbabwe has little or no rain. This means corn crops in Zimbabwe are poor. The last El Nino was in 1991 to 1993. That was when southeastern Africa suffered a serious lack of rain. The scientists wrote about their recent work in the publication Nature. Their computer program can tell when an El Nino will develop up to a year before it does. They suggest that this could provide an effective early warning system for southern Africa, and could prevent many people from starving. Question: Which of the following is NOT true according to the article? Options: A: The computer is used in this research work. B: Scientists know when an El Nino appears by means of the computer program. C: The scientists published their results of the research work. D: Nature is the name of the article written recently by the scientists.
**Answer**
D