——WhatdoyouusuallyuseyourMP3

問題詳情：

——What do you usually use your MP3______?    

—— ________ the music.

A. to do; Listen to    B. for; To listen to         C. to do; Listening to     D. for; Listen to

【回答】

B

知識點：非謂語動詞

題型：選擇題