________inthestorybookthathehadb

发布时间：2020-07-09 22:36:21

________ in the story book that he had bought not long before, the boy didn't notice hismother go into his room．













A.Losing












B.Lost











C.Having lost











D.To be lost

网友回答

B解析be lost in“沉迷于……”，此处过去分词短语作原因状语。
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