Jean did not have time to go to the concert last night because she was busy______for her history examination.

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问题 Jean did not have time to go to the concert last night because she was busy______for her history examination.

选项 A、to prepare
B、preparing
C、to be prepared
D、being prepared

答案B

解析 考查固定用法。句意:昨晚简没有时间去音乐会,因为她正忙于准备历史考试。be busy doing…意为忙于做某事,主语和prepare的关系是主动的,所以选B。
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