Many people are taking part in various outdoor activities themselves.A. refreshedB. to re

问题补充：

Many people are taking part in various outdoor activities themselves.

A. refreshed

B. to refresh

C. being refreshed

D. having been refreshed

答案：

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。