________ of his son’s safety, the father...

________ of his son’s safety, the father turned off the light and went to bed.

A. Being convinced B. Convincing

C. Convinced D. Having convinced

C 【解析】试题解析：考查分词短语作状语。现在分词作状语，与主句主语存在主动关系；过去分词作状语，与主句主语存在被动关系，be convinced of 确信，认识到，故与主语为被动关系，所以应使用过去分词作状语。句意：确信他的儿子是安全的，父亲于是关灯上床。故选C。考点：考查分词作状语。

考点分析：

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