题目: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
喵查答案:C
题目: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
喵查答案:C