Many accidents by careless drivers last year. A. are caused B. were caused C. have caused D. will cause 题目和参考答案——青夏教育精英家教网—

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Many accidents ______ by careless drivers last year.

　　A. are caused B. were caused C. have caused D. will cause

【答案】

【解析】本题是对被动语态的考察，主语accidents与谓语动词cause是被动关系，而且整体时态从yesterday可知是一般过去时。

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