2021年大学英语四级听力题-历年四级听力真题原文.docx

大学英语四级听力题:历年四级听力真题原文

　　大学英语四级听力题
大学英语四级听力题 大学英语四级听力试题 听力真题：
　　Passage Three 32. A. About 1920. B. Around 1925. C. Around 1930. D. About 1935. 33. A. Over 16 million. B. Over million. C. Over 1 million. D. Over million. 34. A. Corn. B. Soybean. C. Oat. D. Rye. 35. A. Corn. B. Soybean. C. Oat. D. ：
　　Passage Three Over the years, new technologies have changed farming. Change in a general direction is a trend. Yet people often recognize trends only when they consider the past. Today, we look back at some trends in American agriculture. 32In 1920, America had more than 25 million horses and mules. Most were used for farm work. 32Around the same time, a competitor began to appear in large numbers. Tractors could turn soil, pull loads and speed harvests — and they could do it better. More tractors meant fewer horses and mules. 33By the 1960s, the numbers of these work animals settled to where they remain today. That is about one-tenth the levels in 1920. Yet even the demand for tractors had its limits. Their numbers have been slowly decreasing since 1982. Experts say farmers can do more with less now because of new technologies. As tractors replaced horses and mules, farmers no longer needed to raise crops to feed work animals. Oats have long been food for horses and mules. In 1954, American farmers planted over sixteen million hectares of oats. By 2021