题目

如图是《我国古代部分朝代更迭示意图》，①指代（） A . 梁 B . 蜀 C . 前秦 D . 东晋 答案：B _______ in her graduation paper, Mary has no time to do a part-time job.A. Having been burying B. Having buriedC. To be buried D. Buried