【正文】 on words to amuse us. One person asks a question which expects a particular reply. Instead, what he gets is another kind of answer which makes the situation funny. Now read some of these customer and waiter jokes. Can you match the joke with the explanation? 1 C: What39。s bodies over time. Many of these chemicals can lead to cancer or other illnesses. In addition, fruit, vegetables and other food grown with chemical fertilizers usually grow too fast to be full of much nutrition. They may look beautiful, but inside there is usually more water than vitamins and minerals. With these discoveries, some farmers and many customers are beginning to turn to organic farming. Organic farming is simply farming without using any chemicals. They focus on keeping their soil rich and free of disease. A healthy soil reduces disease and helps crops grow strong and healthy. Organic farmers, therefore, often prefer using natural waste from animals as fertilizer. They feel that this makes the soil in their fields richer in minerals and so more fertile. This also keeps the air, soil, water and crops free from chemicals. Organic farmers also use many other methods to keep the soil fertile. They often change the kind of crop in each field every few years, for example, growing corn or wheat and then the next year peas or soybeans. Crops such as peas or soybeans put important minerals back into the soil, making it ready for crops such as wheat or corn that need rich and fertile soil. Organic farmers also plant crops to use different levels of soil, for example, planting peanuts that use the ground39。s family in 1930, Dr Yuan graduated from Southwest Agricultural College in 1953. Since then, finding ways to grow more rice has been his life goal. As a young man, he saw the great need for increasing the rice output. At that time, hunger was a disturbing problem in many parts of the countryside. Dr Yuan searched for a way to increase rice harvests without expanding the area of the fields. In 1950, Chinese farmers could produce only fifty million tons of rice. In a recent harvest, however, nearly two hundred million tons of rice was produced. These increased harvests mean that 22% of the world39。 education was always placed second to boys39。Aren39。必修4 Unit 1A STUDENT OF AFRICAN WILDLIFE It is 5:45 am and the sun is just rising over Gombe National Park in East Africa. Following Jane39。t they lucky? And then I think about small chimps in cages though they have done nothing wrong. Once you have seen that you can never forget ... She has achieved everything she wanted to do: working with animals in their own environment, gaining a doctor39。. Was she so much cleverer than anyone else? Further reading made me realize that it was hard work and determination as well as her gentle nature that got her into medical school. What made her succeed later on was the kindness and consideration she showed to all her patients. There was story after story of how Lin Qiaozhi, tired after a day39。s people are fed from just 7% of the farmland in China. Dr Yuan is now circulating his knowledge in India, Vietnam and many other less developed countries to increase their rice harvests. Thanks to his research, the UN has more tools in the battle to rid the world of hunger. Using his hybrid rice, farmers are producing harvests twice as large as before. Dr Yuan is quite satisfied with his life. However, he doesn39。s surface followed by vegetables that put down deep roots. Some organic farmers prefer planting grass between crops to prevent wind or water from carrying away the soil, and then leaving it in the ground to bee a natural fertilizer for the next year39。s that fly doing in my soup? W: Swimming, I think!2 C: What39。s been. I want to know what it is now.3 C: Waiter, will the pancakes be long? W: No, sir. Round. 2 Some jokes are longer and tell a short, funny story. The following is one of those jokes about the famous detective Sherlock Holmes and his friend Doctor Watson. Read it and decide which of these two kinds of jokes you like better. Give your reasons. Sherlock Holmes and Doctor Watson went camping in a mountainous area. They were lying in the open air under the stars. Sherlock Holmes looked up at the stars and whispered, Watson, when you look at that beautiful sky, what do you think of? Watson replied, I think of how short life is and how long the universe has lasted. No, no, Watson! Holmes said. What do you really think of?. Watson tried again. I think of how small I am and how vast the sky is. Try again, Watson! said Holmes. Watson tried a third time. I think of how cold the universe is and how warm people can be in their beds. Holmes said, Watson, you fool! You should be thinkin