必修四 U2 working the land 课文挖空练习.docx

必修四 u2 working the land 课文挖空练习a pioneer for all people 1. _ he is one of chinas most famous scientists, yuan longping considers himself a farmer, for he works the land to do his research. indeed, his 2. _ (嗮黑的)face and arms and his slim, strong body are just like those of millions of chinese farmers, 3. _ whom he has struggled for the past five 4. _ (十年). dr yuan longping grows 5. _ is called super hybrid rice. in 1974, he became the first 6. _ (短：农业先驱) in the world to grow rice that has a high 7. _（产量）. this special strain of rice makes 8. _ possible to produce one-third more of the crop in the same fields. now more than 60% of the rice 9. _ (produce) in china each year is from this hybrid strain. 10. _ （bear）into a poor farmers family in 1930, dr yuan 11. _(毕业于) southwest agricultural college in 1953. since then, 12. _ (find) ways to grow more rice 13. _ (be) his life goal. as a young man, he saw the great need 14. _ increasing the rice output. at that time, 15. _ (hungry) was a 16._ (令人不安的) problem in many parts of the countryside. dr yuan 17._ (短：寻找) a way to increase rice harvests without 18._(使变大) 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 19._ (produce). these increased harvests mean that 22% of the worlds people 20. _ (feed) from just 7% of the farmland in china. dr yuan is now 21. _ (传播) his knowledge in india, vietnam and many other less developed countries 22. _ (increase) their rice harvests. 23. _ (短：由于) his research, the un has more tools in the battle24. _ (短：消除世界饥饿). 25. _ (use) his hybrid rice, farmers are producing harvests 26. _ (短：比以前多了一倍) before. dr yuan 27. _（短：对十分满意）his life. however, he doesnt care about being famous. he feels 28. _ gives him less 29. _ (free) to do his research. he 30. _ (短：宁可) keep time for his hobbles. he enjoys listening to violin music, playing mah-jong, swimming and reading. spending money on himself or 31 _（短：过一个安逸的生活）also means very little to him. indeed, he believes that 32._ (短：一个拥有太多钱的人) has more rather than fewer troubles. he therefore gives millions of yuan to 33. _（短：为而提供装备） their research in agriculture. just dreaming for things, however, costs nothing. long ago dr yuan had a dream about rice plants as tall as sorghum. each ear of rice was as big as an ear of corn and each 34. _ (粮食) of rice was as huge as a peanut. dr yuan awoke from his dream 35._ the hope of producing a kind of rice that could feed more people. now, many years later, dr yuan has another dream: to 36. _（出口） his rice so that it can 37. _ (grow) around the globe. one dream is not always enough, 38. _ (especial) for a person who loves and cares for 39. _ people.chemical or organic farming?over the past half century, using 1._（化肥）has become very common in farming. many farmers welcomed them as a great way to stop crop disease and increase 2._ (生产). recently, 3._, scientists have been finding that long-term use of these fertilizers can 4. _（短：对造成损害）the land and, even more dangerous, to peoples health.what are some of the problems 5._ (cause) by chemical fertilizers? first, they damage the land by killing the helpful bacteria and 6._ (害虫) as well as the harmful 7. _. chemicals also stay in the ground and underground water 8. _ a long time. this 9. _ (影响) crops and, therefore, animals and humans, since chemicals get inside the crops and cannot just 10. _（短：冲洗掉）. these chemicals in the food supply 11. _ (短：堆积) in peoples bodies over time. many of these chemicals can 12._ (短：导致) cancer or other illnesses. 13. _ (短：此外), fruit, vegetables and other food 14. _ (grow) with chemical fertilizers usually grow too fast to be full of much 15. _ (营养). they may look beautiful, but inside there is usually more water than vitamins and 16. _（矿物质）.17. _ these discoveries, some farmers and many customers are beginning to 18. _ (短：转向有机农业). organic farming is simply farming without using any chemicals. they 19. _ (短：集中于) keeping their soil rich and 20. _ (使免受疾病影响). a 21. _ (health) soil reduces disease and helps crops grow strong and healthy. organic farmers, therefore, often prefer 22. _ (use) natural waste from animals as fertilizer. they feel that this makes the soil in their fields richer in minerals and so more 23. _（肥沃的）. this also keeps the air, soil, water and crops free 24._ chemicals. organic farmers also use many other methods 25. _ (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. 26. _ (庄稼)such as peas or soybeans put important minerals back into the soil, 27. _ (make) it ready for crops such as wheat or corn 28. _ need rich and fertile soil. organic farmers also plant crops to use different levels of soil, for example, planting peanuts that use the grounds surface 29. _ (follow) by vegetables that put down deep 30. _（根）. some organic farmers prefer planting grass between crops 31. _ (prevent) wind or water from