---Volunteering is becoming popular in China .Yeah people are now aware that helping

问题补充：

---Volunteering is becoming popular in China .

--- Yeah, people are now aware that helping others is helping themselves.

A. naturally

B. successfully

C. thoroughly

D. increasingly

答案：

A. naturally

B. successfully

C. thoroughly

(答案→)D. increasingly

解析：副词辨析。A自然地；B成功地；C彻底地；D越来越…；句意：—在中国志愿工作越来越受欢迎。根据句意说明D正确。