Completed his examination of the woman patient, the doctor offered his judgment of her condition.

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问题 Completed his examination of the woman patient, the doctor offered his judgment of her condition.

选项 A、Have completed
B、So completing
C、Upon completing
D、As completing

答案C

解析 本题重点考查常见介词用法辨析。画线部分使用了过去分词,过去分词可表示被动、完成。本句中叙述了医生先检查,后诊断两个动作,动作之间几乎是没有间断的,所以这里用过去分词是错误的。四个选项中,so不是介词,后面不能跟v+ing形式,尽管as也可以作介词使用,但它的语义是“作为,以……的身份;如同”,排除B和D选项,故选C。
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