题目内容
(2017·辽宁丹东·32)—Many accidents ________ by careless drivers last year.
—Oh,that's terrible. We must follow the traffic rules.
A. are caused B. were caused C. have caused D. caused
B 【解析】句意:-去年很多事故是由粗心的司机造成的。-哦,那太可怕了。我们必须遵守交通规则。are caused一般现在时的被动语态,被导致;were caused一般过去时的被动语态;have caused现在完成时态,主动形式;caused过去分词。根据句意可知,这句话的主语Many accidents和谓语动词cause构成被动关系,应使用被动语态,再根据句中的时间状语last ye...
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