I think the music is great it is worth .A. to listen B. to listen toC. listeningD. listen

问题补充：

I think the music is great, it is worth .

A. to listen

B. to listen to

C. listening

D. listening to

答案：

A. to listen

B. to listen to

C. listening

(答案→)D. listening to

解析：句意：我认为这个音乐很不错，很值得听。短语be worh doing值得做某事，listen是不及物动词，后面接宾语需加to，故选D。