温馨提示： 此套题为Word版，请按住Ctrl,滑动鼠标滚轴，调节合适的观看比例，答案解析附后。关闭Word文档返回原板块。课后阅读训练 十二Unit 3Period 4. 阅读理解ANow, we know that if we do not get enough vitamins, we are at risk of developing a number of diseases. As a result, vitamin supplements(补品), though expensive, are popular with people who worry that they are not getting enough vitamins from the foods they eat. But contrary to what many people think, medical experts have found little evidence that most supplements do anything to improve health or protect against disease. In fact, medical experts warn that taking too many of some vitamins can be harmful. For example, too much vitamin E can cause bleeding. People should discuss what vitamins they take with their doctors, as some vitamins can produce harmful side effects when mixed with medicines. Experts, however, do say that sometimes vitamins can help prevent disease. People who know they lack a particular vitamin should take vitamin supplements. Some older adults, for example, may not have enough vitamin B-twelve. This is because, as people get older, their body loses its ability to take it from foods. Also, people who spend much time inside may need some extra vitamin D as the skin makes this vitamin from sunlight. Different vitamins are found in different foods. Vitamin A is found in fish liver oil. It is also in the yellow part of eggs. Sweet potatoes, carrots and other darkly colored fruits and vegetables contain substances that the body can change into vitamin A. Vitamin B-twelve is found in green leafy vegetables and other foods, like fruits. Vitamin K can be found in pork products. In fact, for most people, a balanced diet can ensure enough of the vitamins our bodies need. So, it is important for us to eat a mixture of foods every day to ensure that we get enough vitamins our bodies need. 【语篇概述】本文是说明文。文章说明了维生素对人体健康的益处, 并指出平衡饮食可以得到足够的维生素。1. What is probably talked about before this passage? A. How many vitamins a persons body needs. B. How many vitamins some foods contain. C. What people should do to stay healthy. D. The benefits that vitamins bring to our health. 【解析】选D。推理判断题。根据第一段的首句“如果我们摄入的维生素不够, 我们就会有生各种疾病的风险”可知, 上文可能会谈到维生素对健康的好处。2. Vitamin supplements are popular with people because_. A. people fear that a lack of vitamins will lead to diseaseB. they contain more vitamins than the foods people eatC. food does not provide enough vitamins people needD. people mistakenly think that they are good for their health【解析】选A。细节理解题。根据第一段前两句可知, 人们担心摄入的维生素不够的话就可能会生病, 所以一些补品就很受人们欢迎。3. What would be the main idea of the passage? A. Vitamins are important to our health. B. Vitamin supplements do harm to our health. C. Getting enough vitamins through a balanced diet. D. Lacking vitamins can cause many diseases. 【解析】选C。主旨大意题。根据文章特别是最后一段的说明可知, 本文是关于维生素对人体健康的益处及如何通过平衡饮食摄入足够的维生素。BPeople should listen to music for no more than one hour a day to protect their hearing, the World Health Organization suggests. It says 1. 1 billion teenagers and young adults are at risk of permanently damaging their hearing by listening to“too much, too loudly”. WHO figures show 43 million people aged 1235 have hearing loss and this number is increasing. In that age group, half of people in rich and middle-income countries were exposed to unsafe sound levels from personal audio devices. Meanwhile 40% were exposed to damaging levels of sound from clubs and bars. The percentage of US teenagers with hearing loss went from 3. 5% in 1994 to 5. 3% in 2006. Dr Etienne Krug, the WHOs director for injury prevention, told the BBC, “What were trying to do is raise awareness of an issue that is not talked about enough, but has the potential to do a lot of damage that can be easily prevented. ”The full report argued, “While it is of vital importance to keep the volume down, limiting the use of personal audio devices to less than one hour a day would do much for reducing noise exposure. ”The World Health Organization recommends keeping the volume to 60% of the maximum as a proper way for listening. For people on plane or train, it says noise-cancelling(降噪)headphones allow music to be heard clearly at a lower volume. And the WHO adds that earplugs(耳塞)should be worn at noisy places and advises taking “listening breaks” now and then. “We do realise that many risk factors linked to pleasure are not easy to change, but we have to make people aware, ”Dr Krug said. But as well as calling for personal responsibility, the WHO says governments and companies have a responsibility. It says clubs should provide relaxing rooms and give out free earplugs, headphone companies should set limits on the volume, and governments need to adopt stricter laws. Paul Breckell, the chief executive of the charity Action on Hearing Loss, said, “When listening to loud music, for every three decibels(分贝)increase in level, to stay safe you should cut half of your listening time. ”【语篇概述】世界卫生组织(WHO)研究发