非谓语作状语，且表示主动。下面这道题应该首先排除A和D啊-查字典问答网

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　　非谓语作状语，且表示主动。下面这道题应该首先排除A和D啊

　　_____about his own safety,Peter put a card on the back of his car reading"Caution---Newly Licensed."A Concerned B Concerning C Having concerned D Being concerned

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2016-05-1618:49

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木木奇

　　同学，你好。这道题目之前也已经给你解释过了，这句话的原话应该是： Peter was concerned about his own safety,Peter put a card on the back of his car reading"Caution---Newly Licensed." 这里为了句子更加简练，用动词的过去分词作状语，所以省略了Peter was。concerned前面不用添加任何成分。