Then Once upon a time, people spent lots of time at home on weekends. Then, new inventions changed the weekends. ◆People used electric(电动的) streetcars to travel in cities. On weekends, they rode the streetcars to parks. Young people liked roller coasters(过山车). ◆The first movie lasted only one minute. Soon movies lasted longer. In the 1920s, movie theaters sold millions of tickets each week. In 1927, movies eventually(最终) had sound. Sometimes, people stayed at home instead, and listened to another new invention — radio. ◆People in cities worked indoors during the week, so they wanted to be outdoors on weekends. Bicycling became a popular activity. | 
