Last month, doctors used a 3-D printer t...

Last month, doctors used a 3-D printer to rebuild the face of a person ____ had a bad accident.

A. /B. whichC. whomD. who

D 【解析】试题分析：which代替物，whom宾格，代替人，who主格，代替人。本句中who引导的句子在主句中作定语，修饰先行词a person，并且在从句中作主语。句意：上个月，医生用3D机器把经历一场严重事故的人的脸修复好了。故选D。考点：考查定语从句的用法。

考点分析：

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