________ through all kinds of hardships, he is able to cope with whatever difficulties encountering him.A.Having goneB.GoingC.To goD.Went
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A解析本句中的现在分词短语Having gone through all kinds of hardships作状语表示原因。由句意可以看出，go through和be able to cope with有明显的先后关系，现在分词的完成式表示动作先于谓语动词。