_____(集中精力于)his scientific research ,he had no time left for recreational activi

游客2023-07-26 17

问题 _____(集中精力于)his scientific research ,he had no time left for recreational activities.

选项

答案 Absorbed in

解析 be absorbed in意思是“集中精力于，埋头于”，本题中过去分词短语作原因状语。

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Learningdoesnothappenpassively.Itisanactivitywhichapersondoes.I