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After ________in the research for so many years,the scientist succeeded in finding the result at last.
A.buriedB.being buriedC.having buriedD.having been buried
D

试题分析:考查动名词用法。动名词的通常放在介词后后面。当动名词的动作发生在谓语动词之前的时候,使用完成式。惊讶:在致力于研究工作很多年以后,这位科学家终于成功找到了一个解决的方法。根据句意说明多年的研究工作是在找到答案之前就发生的。故使用完成时。而本句是一个固定词组be buried in…致力于…
点评:动名词的通常放在介词后后面。当动名词的动作发生在谓语动词之前的时候,使用完成式。同时也要注意动名词的复合结构。
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