What's wrong________your arm？A.toB.inC.withD.about
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C解析分析：句意是“你的胳膊怎么啦？”with表示“对象”“关系”(延伸)What's wrong with your arm？＝What's the matter with your arm？Is there anything wrong with your ann？＝Is there anything the matter with your arm？There's nothing wrong with my arn．＝There's not anything wrong with my ayn．＝There's nothing the matter with my arm．＝There's not anything the matter with my arm．