After ________in the research for so many years，the scientist succeeded in finding the result at las...
2022-12-19 22:36:43 155次 2015届吉林省高一上学期期末考试英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
After ________in the research for so many years，the scientist succeeded in finding the result at last.
A．buried B．being buried C．having buried D．having been
buried
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