Since to the world the dance “Gangnam Style” has gained greart great popularity.A. introd

问题补充：

Since to the world, the dance “Gangnam Style” has gained greart great popularity.

A. introduced

B. introducing

C. being introduced

D. to be introduced

答案：

(答案→)A. introduced

B. introducing

C. being introduced

D. to be introduced

解析：introduce的逻辑主语the dance “Gangnam Style”与introduce之间是被动关系，故用过去分词作时间状语。