[2004.10]Jean didn't have time to go to the concert last night because she was busy ______ for the examination.

 

　　A.to prepare

 

　　B.to be prepared

 

　　C.preparing

 

　　D.being preparing

 

 

　　正确答案：C

 

　　答案解析：本题考查be busy doing为习惯用法，表示：忙于做什么。句中意思为Jean因忙于准备考试，故昨晚没时间去听音乐会。