The special dance Gangnam Style is popular all over the world and was even performed in t

问题补充：

The special dance，Gangnam Style，is popular all over the world and was even performed in the White House.

A. steadily

B. firmly

C. increasingly

D. regularly

答案：

A. steadily

B. firmly

(答案→)C. increasingly

D. regularly

解析：C考查副词辨析。steadily平稳地；firmly坚定地；increasingly 日益，愈加；regularly有规律地。根据句意应选C。