单元加餐练.阅读理解Not long ago, people could only buy organic food in small shops. Today it is common in most major supermarkets. The reason for the increase is that more and more people are demanding food grown without chemicals. Since the 1990s, organic farm production has gone up 20 percent every year. This pattern is expected to continue around the globe.Australia leads the world in land used for organic agriculture. It has four times as much land devoted to organic farming as all of Asia. However, most of the land is not very fertile, and it only produces a modest amount of food. Argentina is a distant second, followed by Brazil, the United States and China. In Africa, only a very small amount of land is registered for organic farming. That does not mean Africa relies on chemicals. In fact, many farmers do not use chemicals because they cannot afford them. Yet there are no programs for these farmers to prove they do not use chemicals. Without these programs their food can never be approved organic.India has had the most dramatic recent increase in organic farming. Like many other countries, India sees continual growth in organic food sales around the world. This, of course, leads to growth in profits. Like India, many countries are trying to increase commercial organic farming to get a share of the sales. This has led to criticism. Some people believe that organic farming should not just be about making money. They think the goal is to help the environment. Others say organic farming will not continue if it is not profitable. They say that people should be able to make money while providing food that is healthy to mankind.语篇解读：随着有机食品的热销，近年来有机农业也在逐步升温。但是，人们对有机农业的快速发展却看法不一。1What is the passage mainly about?AOrganic food has become much more common.BPeople do not want to eat food with chemicals in it.CFarming organically is growing around the world.DCountries all want to make money by organic farming.解析：选C主旨大意题。通读全文可知，本文举例说明了有机农业在全球的快速发展：澳大利亚拥有世界上最多的有机农田，阿根廷、巴西、美国和中国紧随其后，印度在有机农业方面的发展最为迅速。因此选C。2Why do people want to increase organic farming?AMore and more people demand chemicals to grow food.BProfits from organic farming help make approval programs.CThere are fewer chemicals available to the human beings.DOrganic food is good for the earth and the human beings.解析：选D细节理解题。根据最后一段倒数第三句和最后一句可知，人们想发展有机农业的原因是有机农业有利于环境，且对人的身体健康有好处。3From the passage, it can be said that _.AIndia uses the least land to farm organicallyBthe US is the fourth largest organic farming countryCBrazil uses less land to farm organically than ChinaDChina and India have the same amount of organic farmland解析：选B细节理解题。根据第二段前四句可知，澳大利亚拥有世界上最多的有机农田，阿根廷、巴西、美国和中国紧随其后。因此，B项正确。 4It can be inferred from the passage that _.Apeople who eat food with chemicals have shorter lifespanBIndia will soon become the largest grower of organic foodCmore countries will farm organically as the environment gets worseDthere will be fewer organic farms if demand for organic food goes down解析：选D推理判断题。根据第一段和最后一段第四、五句可知，因为有机食品的热销，有机农业才得以迅速发展。由此可推知，如果人们对有机食品的需求量降低了，有机农业的规模也会随之变小。.阅读七选五We all face quantities of stress in a daytoday living, whether at work, at home, or anywhere in between. _1_ Heres how stress can help us on an everyday basis.Sharpening your memory. Did you ever notice that sometimes when you are stressed, your memory seems to improve？Remember that test you passed where the answers seemed to come out of nowhere? _2_ Its because of stress hormones (荷尔蒙) that increase your alertness when its most needed._3_Successful employees turn stress into motivation. Have you ever noticed that you get the least amount of work done when you have the fewest deadlines? Too little stress can affect how much you actually get done. When you take risks and choose to get over the difficulty, it improves your mental toughness and selfconfidence.Helping you resist the attack of illness._4_ Believe it or not, the right kind of stress can help your bodys defenses against illness. When you get sick, stress causes you to make hormones that battle threats to your health. That burst of stress is helpful to your immune system when your body faces a threat. Making your life more interesting.Think about some stressful situations that we consciously put ourselves in to make life more interesting and enjoyable, like asking someone out on a first date, conquering a known fear, or learning something new. These may not immediately come to mind when you think of stress because of the positive outcomes. _5_AHelping you get an advantage at work. BHelping you get through difficult time. CThis will happen whenever you are stressed. DThats one way your brain responds to stress.EYou need a healthy immune system to help fight off diseases.FBut theyre the types that can help you achieve fulfillment and happiness.GBut handled properly, stress can have many ben