题目内容
12.School uniforms must be double-checked before being handed to students following an incident last month where they to contain cancer-causing dyes.( )A. | will be discovered | B. | will discover | ||
C. | were discovered | D. | discovered |
分析 继上个月它们被发现含有致癌染料这一事件发生之后,校服在被发给学生们之前必须要进行仔细检查.
解答 答案:C
分析句子结构可知,"following an incident last month where they to contain cancer-causing dyes"是分词短语用作时间状语,其中的定语从句"where they to contain cancer-causing dyes"用来修饰先行词an accident,意为:在这一事件中,它们被发现含有致癌染料;该从句中的主语是they即指上一句提到的School uniforms,与为谓语discover构成被动关系,所以此处需要使用被动语态;根据句中的时间状语last month(上个月),因此这里要用一般过去时态的被动语态(were discovered ).故选C
点评 本题考查了一般过去时态的被动语态.做此类题时需要注意两点:一是首先要根据句意来判断主语与谓语动词是否构成被动关系;二是句中要有表示过去的时间状语,或根据语境可以判断出该动作或状态是发生在过去;具备以上两点就要用一般过去时态的被动语态,即was/were+动词的过去分词.
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