it is to listen to music when you are free. A. What funB. What a funC. How funD. How funn

问题补充：

it is to listen to music when you are free.

A. What fun

B. What a fun

C. How fun

D. How funny

答案：

(答案→)A. What fun

B. What a fun

C. How fun

D. How funny

解析：考查感叹句。fun是不可数名词，故用what修饰，引导感叹句。