Ques: Article: Winter is coming, and some parts of the world are already covered with deep snow. The best way to warm those cold hands is a cup of hot sweet chocolate. Hot chocolate has been used for many years to treat diseases and fight bad moods. It's known as a special healthy drink from the 16thto 19thcenturies, and sometimes was taken as a medicine. Nowadays people don't consider hot chocolate as a medicine, but drink even more than ever! There are plenty of tasty and healthy hot chocolate recipes you can try to enjoy the following health benefits of drinking hot chocolate. It improves your brain power The study shows that drinking hot chocolate can help improve your brain power and your brain health. The flavonoids in hot chocolate increase the blood flow and oxygen to your brain, helping you think better. If you want to improve your memory, try drinking two cups of hot chocolate a day. Not only will you improve your memory, but your mood as well. Just make sure you don't use too much sugar in your hot chocolate.[:Zxxk.Com] It improves your mood Chocolate, including hot chocolate, is well-known mood booster. This tasty drink helps fight stress, anxiety, and depression. But the problem is, hot chocolate may contain high amounts of sugar. Consider making sugar-free hot chocolate to get all its mood-improving properties . It can help you lose weight If you are trying to drop a few pounds, drinking hot chocolate can help you achieve your weight loss goal. When made correctly, hot chocolate is a delicious and low calorie drink that you can enjoy every time you have chocolate desire. Besides, drinking a cup of low calorie hot chocolate helps prevent the intake of high-calorie and sugar foods like cakes. Now that you're aware of some of the best health benefits of drinking chocolate, what are you waiting for? Rush into your kitchen and make this fantastic winter drink. Question: In the passage the author mainly talks about _ . Yes or no, is the answer "benefits of drinking hot chocolate"?
Ans: No

Ques: Article: Zhoukoudian is a small village situated about 50 kilometers to the southwest of Beijing. In the 1920s, archaeologists discovered some prehistoric human bones there which changed people's view of China's history. They came from an unknown species of man and were the first evidence of human life in China thousands of years ago. The remains were three teeth! In 1929, a complete skull was also discovered. Eventually, archaeologists found almost 200 items, including six skulls and more than 150 teeth. These discoveries proved the existence of a human species who lived in the area between 700,000 and 200,000 years ago. Four sites where Beijing Man and his relatives lived were discovered on the northern face of Longgushan. They lived in the caves in the area. However, the life span of Beijing Man was short. About 70% of the people probably died before the age of 14. Fewer than 5% lived to the age of 50. Ashes were found alongside the fossils which showed they had used fire for cooking food and also for light, warmth, and protection against wild animals. This is the earliest evidence of the use of fire anywhere in the world. They also made tools of bones and stones. Unfortunately, when Japan invaded China in 1937, excavations at the Beijing Man Site stopped and most of the fossils disappeared, including a Beijing Man skull. After the People's Republic of China was established in 1949, the work started again. Zhoukoudian was listed as a World Heritage Site in December 1987. It has not only given us important information about prehistoric Asian societies, but also provided amazing evidence about the process of evolution. Today, parts of the caves have been badly affected by rain. Some areas are almost completely covered in weeds, causing serious damage. Pollution from the nearby factories has also led to the problem. This is a very serious matter and the Chinese Academy of Sciences is trying to raise public awareness of protecting it. Question: Archaeologists _ . Yes or no, is the answer "discovered some prehistoric human bones in Zhoukoudian"?
Ans: Yes

Ques: Article: A breathtaking trick potentially left over from our ancestors might be found in us -- the ability to sense oxygen through our skin. Amphibians, animals such as frogs that can live both on land and in water, have long been known to be capable of breathing through their skin. In fact, the first known lungless frog that breathes only through its skin was discovered recently in the rivers of Borneo. Now the same oxygen sensors found in frog skins and in the lungs of mammals have unexpectedly been discovered in the skin of mice. "No one had ever looked," explained Randall Johnson, a biologist researcher. Mice and frogs are quite distant relatives, so the fact they have these molecules in common in their skin suggests they might well be found in the skin of other mammals, such as humans. "We have no reason to think that they are not in the skin of people too," Johnson said. These molecules not only detect oxygen, but help increase levels of vital red blood cells, which carry oxygen around the body. Normal mice breathing in air that is 10 percent oxygen--a dangerously low level similar to conditions at the top of Mount Everest, and about half that of air at sea level. However, mice that had the oxygen sensor HIF-1a genetically removed from their skin failed to produce this hormone even after hours of such low oxygen. These findings, if they hold true in humans, suggest one could raise the level of oxygen circulating inside the body. This could help treat lung diseases and disorders such as anemia without injecting drugs, which make up a multibillion-dollar market, Johnson said. Athletes also often try to get more oxygen delivered to their muscles in order to improve their performance. They often do this by training at high altitudes or in low-oxygen tents. The new study suggests they might want to expose their skin as well as breathing in low-oxygen air to improve their performance. "It's hard to say what exactly might be done, however--there's a lot we don't know yet," Johnson explained. The scientists... Question: One of the functions of the molecules mentioned above is _ . Yes or no, is the answer "detecting oxygen"?
Ans: No

Ques: Article: I come from a city on the United States'east coast. It's a ten-hour flight for me to get home from Shanghai. When I got off the plane, I took photos of the blue sky and white clouds along the way. After two weeks, I returned to Shanghai. Much to my surprise, the blue sky in Shanghai that I liked before was not as blue as that in the US. I couldn't help wondering what had happened. A few days later, I went to tour Waitan (a famous tourist attraction in Shanghai) by the Huangpu River with some of my friends. There we saw five Ferrari sports cars by the side of the road. The red and yellow cars looked so nice that everyone was looking at them. However, when I turned my head, I noticed the sky over Waitan, I was shocked to find that the buildings in the Lujiazui area on the other side of Huangpu River could hardly be seen. It was then that I realized that Ferrari cars could be bought with money, but a blue sky couldn't. Shanghai is an important economic and trade center in China. It has made great contributions to the whole nation's economic development. However, we need to protect the environment during economic growth. Pollution is poisoning our air and our rivers. Without clean air and rivers, how will people be able to survive? Question: What can we learn about the author? Yes or no, is the answer "He is socially responsible ."?
Ans:
Yes