听下面一段材料, 回答第1-3题。 1. According to the man's view, what is swimming good for? A. Legs. B. Back. C. Heart. 2. According to the man's view, what's very good for breathing? A. Soccer. B. Shadowboxing. C. Jogging. 3. Why does the man like cycling? A. It is not expensive. B. It is very convenient. C. It is very safe.