Many people are taking part in various outdoor activities themselves.
A. refreshed
B. to refresh
C. being refreshed
D. having been refreshed
网友回答
A. refreshed
(答案→)B. to refresh
C. being refreshed
D. having been refreshed
解析：考查不定式做目的状语：句意：很多人在参加各种各样的户外活动，来给自己提神。根据句意这是目的状语，只有不定式可以做目的状语，选B。