My dad bought me a new MP4 player but I don’t know 　　　.A. what to use B. what to use

问题补充：

--- My dad bought me a new MP4 player, but I don’t know .

A. what to use

B. what to use it

C. how to use it

D. when to use it

答案：

A. what to use

B. what to use it

(答案→)C. how to use it

D. when to use it

解析：A. 用什么B. what to use it 说法有误 C. how to use it 如何使用它 D. 什么时候用它。句意：我爸爸给我买了一个新的mp4,但是我不知道如何用。故选C。