提高听力同时，你还可以了解到美国历史上的一些重要事件。请感兴趣的你一听为快吧！

<注意>国家大写
hints： Progressivism;Upton Sinclair;Ida M. Tarbell;Theodore Dreiser
By 1900, the United States had seen growth, civil war, economic prosperity and economic hard times. Americans still believed in religious freedom. Free public education was mostly accessible. The free press continued. On the negative side, it often seemed that political power belonged to a few corrupt officials and their friends in business. In response, the idea of Progressivism was born. Progressives wanted greater democracy and justice. They wanted an honest government to reduce the power of business. Books by Upton Sinclair, Ida M. Tarbell, and Theodore Dreiser described unfair, unhealthy and dangerous situations. These writers hoped their books would force the government to make the United States safer and better for its citizens.
到1900年，美国经历增长时期，内战，经济繁荣，经济困难时期。美国人仍然相信宗教的自由。免费公共教育大部分可访问。自由报刊也在继续。消极的一面，但往往似乎政治权力属于一个少数腐败官员和他们的朋友交易。进步主义的想法应运而生。进步希望更大的民主和正义。他们想要一个廉洁的政府，以降低企业的权力。厄普顿辛克莱，Ida M. Tarbell，德莱塞的书籍描述不公平，不健康和危险的情况 。这些作家都希望他们的书籍，将迫使政府使美国更安全和公民更好。