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7.He worked in a car factory for four years,______ he founded his own company in his hometown.(  )
A.after whichB.after whenC.after thatD.after it

分析 他再一家汽车工厂工作了四年,之后他在家乡建立了自己的公司.

解答 答案A.分析句子结构可知,逗号之前是主句,逗号之后是非限制性定语从句,从句中主语为he,谓语动词为found,宾语为his own company,从句中不缺少主、宾、表等主要成分应该用关系副词,关系副词可理解为介词+关系代词whom(先行词指人时)/which(先行词指物时),主句与从句存在动作先后的时间关系,因此用介词用after,因此从句中为after which,which指代前面整个主语的内容,故选A.

点评 本题考查非限制性定语从句.解答此类题目首先要分析句子结构,非限制性定语从句中逗号是一个明显的标志,然后分析非限制性定语从句中的成分,如果缺成分用关系代词,如果不缺成分用关系副词.

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