提高聽力同時，你還可以了解到美國歷史上的一些重要事件。請感興趣的你一聽為快吧！
<注意>國家名大寫
hints：Ben Nighthorse Campbell
Puerto Rico
César Chávez
the United Farm Workers Union
In 1992, Ben Nighthorse Campbell became the first Native American elected to the Senate. Hispanic Americans from Mexico, Central America, Puerto Rico and Cuba were politically active too. They fought against discrimination. They were elected to local, state, and national positions. César Chávez organized a nationwide boycott of California grapes that forced growers to work with the United Farm Workers Union.
1992年，Ben Nighthorse Campbell成為第一個美國本地人當選為參議院。來自墨西哥，中美洲，波多黎各和古巴的西班牙裔美國人在政治上活躍。他們反對歧視。他們分別是當選地方，州和國家的職務(wù)。塞薩爾查韋斯舉辦的全國性抵制加州葡萄迫使種植者與美國農(nóng)場工人聯(lián)盟工作。