___it is to listen to music when you are free.A what fun B what a fun C how fun D what funny 理由

问题描述:

___it is to listen to music when you are free.A what fun B what a fun C how fun D what funny 理由

what fun
fun是不可数名词.what加名词 How加形容词 funny意味滑稽的,与原句意思不符.