47. in thought he didn’t notice me when I came into his room.A. BuryingB. BuriedC. Put h

问题补充：

47. in thought, he didn’t notice me when I came into his room.

A. Burying

B. Buried

C. Put himself

D. To be set

答案：

A. Burying

(答案→)B. Buried

C. Put himself

D. To be set

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