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 Royal Proclamation;The Currency Act;The Quartering Act
The ideas of liberalism and democracy are the basis of the U.S. political system. As the colonists built their new society, they believed more strongly in these ideas. Britain's 13 colonies grew in population and economic strength during the 1700s. Although ruled by a distant government, the colonists governed many local affairs. After Britain won a costly war with France in the 1750s, the colonists were asked to help pay for the war, and for Britain's large empire. These policies restricted the colonists' way of life. For example, the Royal Proclamation of 1763 restricted the colonists from settling new land. The Currency Act of 1764 made it illegal to print paper money in the colonies. The Quartering Act of 1765 forced the colonists to provide food and housing for the royal soldiers.
自由主义和民主思想是美国政治体系的基础。当殖民者建立他们的新社会，他们更加强烈认定这些思想。在17世纪，英国13个殖民地人口和经济实力都在增长。尽管殖民者被政府规定，但是他们管理许多地方事件。在1750年，之后英国赢得了与法国打得代价很大的战争，殖民者被要求帮助偿还战争费用，为了英国大帝国。这些政治体制限制了殖民者的生活方式。比如说，1763年皇家宣布限制从定居不同的地方的殖民者。1764的货币法案规定在殖民地打印纸钱是不合法的。1765的设营法强迫殖民者为皇家士兵提供食物和住处，