题目内容
【题目】Many traffic accidents ________ because drivers use their smart phones while driving.
A.causeB.have causedC.are causedD.were caused
【答案】C
【解析】
略
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题目内容
【题目】Many traffic accidents ________ because drivers use their smart phones while driving.
A.causeB.have causedC.are causedD.were caused
【答案】C
【解析】
略