________inhisstudy,hedidn’tknowth

发布时间：2020-07-10 12:16:46

________ in his study, he didn’t know that all the others had left．













A.Burying












B.Buried











C.Buried himself











D.He buried

网友回答

B解析be buried in one’s study“专心致力于研究”。
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