学进去

Today, cities are getting too crowded(拥挤的). Many people m1． from the country to cities. Most people w2． or study in the city. When people go to work or come b3． home from work, the street is busy. Buses or cars can’t g4． smoothly(畅通地). Every year, many people get hurt(受伤) or l5． their lives in traffic accidents(事故). W6． is the traffic in cities so bad? Because lots of people h7． cars. They don’t go out by b8． or other public vehicles(公共交通工具). So there are too m9． cars and buses on the street. I think the best w10． is to take the subway. It is fast and safe.