Read the article and select the best answer. Article: When talking about colds, maybe some people say it is very common. During the cold winter days, many people will complain the cold winter makes them catch a cold, and what they feel upset are not only the headache, cough but also the runny nose. It is so embarrassing when they forget to take a handkerchief or tissue along with them. Want to stay away from colds? Put on a happy face. Compared to unhappy people, those who are cheerful and relaxed are less likely to suffer from colds, according to a new study. It's possible that being happy helps the body fight illnesses, say the researchers from New York University. "It seems that positive feelings may reduce the danger of illness," said the study's chief researcher Sheldon Cohen. In an earlier study, Cohen found that people who were cheerful and lively caught coughs and colds less often. People _ were also less likely to tell their doctors that they felt ill. In this study, Cohen has interviewed 193 adults every day for two weeks. During the interviews, the people told researchers that they were given colds by doctors and had to stay alone in a room for six days. The results showed that everyone in the study was equally likely to get ill. But for people who said they felt happy during the research period, their illness are less serious and lasted for a shorter time. Cohen believes that when people experience positive feelings, their body may produce a chemical that helps fight illness and disease. So if you are worried about your health, look on the brighter side more often. Question: What is the best title for this passage? _ Options: A: Smiles can fight colds B: Cause of colds found C: The danger of colds D: How people get sick
A

Read the article and select the best answer. Article: You may have heard adults say they are uncomfortable in the morning without a cup of coffee. One reason they may feel that way is that coffee contains caffeine . Caffeine occurs naturally in coffee, tea, and cocoa beans, which are used to make chocolate. But now food makers are adding it to many products, from potato chips to water. The US government is especially worried about the problem. That's why the Food and Drug Administration (FDA) is studying the health effects of caffeine on young people. Studies show that too much caffeine can make people nervous and unable to sleep. What's more, caffeine is habit-forming. Those who consume it regularly and stop suddenly may experience headaches and feel tired. One of the biggest concerns is the large amount of caffeine added to so-called energy drinks, like Red Bull. A 12-ounce can of cola has about 35 milligrams of caffeine. A similar serving of Red Bull contains more than three times that amount. The Institute of Medicine is also working on caffeine-safety measures. "Teenagers should not drink beverages that contain caffeine. They should be aware of caffeine's effects on health and on how the brain works. Take, for example, teenagers who consume caffeine to stay awake and study for a test. They will remember less of what they just studied," said Stallings, a member of the institute. Companies that make products with added caffeine claim they do not advertise them to kids. However, there is no law to stop children from buying them. So the FDA needs to set limits on caffeine, especially in energy drinks. As for added caffeine in foods, the government should just say no. If not, the amount of caffeine should be printed on food labels to remind consumers. The government must do that. Doctors say kids should avoid caffeine. If you need extra energy, try these natural boosters: eat right, exercise, and get plenty of sleep. Question: What is the US government particularly concerned about? Options: A: The fact that coffee contains caffeine. B: The measures of avoiding caffeine's effects. C: The practice of adding caffeine to foods. D: The practice of using caffeine to make chocolate.
C

Read the article and select the best answer. Article: The illegal ivory trade has been a major problem in Africa for decades. Poachers and hunters have killed off hundreds of thousands of elephants to obtain this precious material. Now, affected areas are taking action. The International Union for Conservation of Nature (IUCN) announced on Wednesday that key states where poaching takes place have promised to stop the ivory trade and protect Africa's elephants. In the 1980s, as many as 1 million elephants across Africa were killed for their ivory tusks. This continued until 1989, when the Convention on International Trade in Species (CITES) voted to ban all trade in ivory. With trade , demand for ivory fell. Elephant populations slowly began to increase. However, this progress was short-lived. According to the IUCN, 2011 saw the highest levels of poaching and illegal ivory trading in at least 16 years. Around 25,000 elephants were killed in Africa that year. Preliminary data from the IUCN shows even higher levels of illegal trade may have been reached in 2013. "With about 22,000 elephants illegally killed in 2012, we continue to face a critical situation," said John E. Scanlon, CITES Secretary-General. "Current elephant poaching in Africa remains far too high, and could soon lead to local extinctions if the present killing rate continues." At the African Elephant Summit, key African states where elephants make their home agreed to develop a "zero-tolerance attitude" towards poaching. The deal calls for maximum sentences for poachers and hunters, and increased cooperation between affected states. Officials are determined to classifying wildlife trading as a serious crime -- and to making sure that the people who commit it are punished. All participants at the conference agreed to sign the deal. With these states coming together, there may yet be hope for elephants. (293 words) Question: Which of the following statements is NOT true according to the passage? Options: A: The CITES has helped to improve elephants' situation ever since 1989. B: Around one million elephants across Africa were killed for their ivory tusks in the 1980s. C: The poaching and illegal ivory trading in 2011 were very serious. D: The situation of elephants in 2012 was still terrible.
A