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：Theodore Roosevelt;Progressivism;Woodrow Wilson;The Federal Reserve;The Federal Trade Commission
President Theodore Roosevelt (1901–1909) believed in Progressivism. He worked with congress to regulate businesses that had established monopolies. He also worked hard to protect the country's natural resources. Changes continued under the next presidents, especially Woodrow Wilson (1913–1921). The Federal Reserve banking system set interest rates and controlled the money supply. The Federal Trade Commission dealt with unfair business practices. New laws improved working conditions for sailors and railway workers. Farmers got better information and easier credit. Taxes on imported goods were lowered or eliminated.
西奥多罗斯福总统（1901年至1909年）坚持进步主义。他与国会合作，以规范建立了垄断企业。他还努力来保护国家的自然资源。变化继续在未来的总统，尤其是伍德罗威尔逊（1913年至1921年）。联邦储备银行系统设定利率和控制货币供应量。联邦贸易委员会处理与不公平的商业惯例。新的法律提高水手和铁路工人的工作条件。农民得到了更好的信息和更容易的信贷。对进口货物税降低或取消。