单项选择题
A. suit different people B. be further explored C. help the disabled D. be used externally E. have healing effects F. be promoted
A．Right B．Wrong C．Not mentioned
A．Most women take walking as their only recreational activity. B．The study aims to track the health conditions of its subjects. C．Irregular walking increased the risk of breast cancer in post-menopausal women D．Walking was the only recreational activity for about half of the women surveyed.