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>
hints：the Articles of Confederation
In 1783, the 13 colonies became the United States. Before the war ended, the colonies had developed the Articles of Confederation, a plan to work together as one nation, but the connections among the 13 states were loose. Each state had its own money, army, and navy. Each state traded and worked directly with other countries. Each state collected taxes in its own way. Each state believed its way was the right way. It was a nation of 13 countries.
在1783年，13个殖民地成为美国。在战争结束之前，殖民地制定了联邦条约，最为一个国家团结起来的计划，但是在13个周志坚联系变得松散。每个周都有它自己的钱，军队，和海军。每个州直接与其他国家交易和合作。每个州以它自己的方式收税。每个周认为它们的方式是正确的方式。美国是13个州的国家。