【正确答案】
B
【答案解析】[听力原文]
My favorite sport is running. But when I ran my first mile, it was the hardest thing I have ever done in my life. Now I have been running for 15 years. Each time I cover as much as 8 miles, and I have developed a habit of running every day. Many people like running. There are several reasons why running seems to be the hardest form of exercise for them. For instance, it is something everyone knows how to do already. So no special training is needed for it. Secondly, it is something you can do anywhere. Of course you must have a good pair of shoes. You can run if you're leaving the city. You can run when you travel. Running is also something you can do at any time, during a lunch hour, or in the early morning.