—Do you think English songs helps to improve your English a lot?—Yes I think so.A. listen

问题补充：

—Do you think English songs helps to improve your English a lot?

—Yes, I think so.

A. listen to

B. listening

C. listening to

D. to listen

答案：

A. listen to

B. listening

(答案→)C. listening to

D. to listen

解析：句意：你认为听英语歌曲有助于提高你的英语水平吗？——是的，我想是这样。动名词做主语表示抽象的动作，结合语境可知选C。