Early in the morning, at noon, or in the evening in big cities and in the countryside, all over the United States, you can see Americans running — men and women, young and old. People run             — along the beaches of California,               Central Park in New York, down quiet streets in small towns or at the gym. Some people even run in              living rooms.
Running wasn’t so popular in the past. In the 1960s, runners were mostly athletes and healthy strong people. When people saw a runner, they used              ,“Hey, what’s the hurry for？”or they might say to              ,“Is he crazy？”At that time, women almost never ran. If they did, they might be laughed at. But today all these have             Men and women of all              enjoy running.
Doctors say many of the health problems in the United States              these bad habits: eating too much, smoking cigarettes, and taking              exercise. Doctors tell us,“Eat less, don’t smoke, and exercise more. ”Running is a good exercise              it helps build strong hearts and lungs. It also helps most people lose weight.

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