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in the story book that he had bought not long before, the boy didn't notice his

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in the story book that he had bought not long before, the boy didn't notice his

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

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A.Losing

B.Lost

C.Having lost

D.To be lost

试题答案

答案:B

解析:

考察非谓语动词,be lost in“沉迷于……”,此处过去分词短语作原因状语。