单选题
1.[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。