【听力原文】
Most people are probably aware of the significance of July 4 to Americans./They might not know, however，about the origins of some of the traditions / associated with Independence Day in the United States. / July 4 is, of course, a holiday from work, /and the occasion for all-day picnics in most communities. / Having eaten their fill of hot dogs, burgers, and potato salad, /everyone eagerly throws themselves into a program of often strange activities/like three-legged races and pie-eating contests. /A visitor to Boston，/a city strongly associated with the events leading up to independence, / will certainly come away with a lasting impression of the Fourth of July. /The highlight of the day's celebrations is a local orchestra playing a melody /as one hundred and fifty thousand spectators watch fireworks burst over the harbor.
【核心词汇】
community n.社区；社会；团体
Independence Day (美国）独立日
picnic n.郊游，野餐
lead up to 导致，使话题(渐渐)转向
orchestra n.管弦乐队
throw into 投身于
be aware of 知道，意识到
