题目内容:
The author uses power walking as an example mainly because______
A. it is an outdoor sport
B. it improves our health
C. it uses fewer resources
D. it is recommended by experts
参考答案:【答案仅供学习,请勿对照自行用药等】
The author uses power walking as an example mainly because______
A. it is an outdoor sport
B. it improves our health
C. it uses fewer resources
D. it is recommended by experts