题目内容
Mr. Smith, ______ in the factory for thirty years, is on the way back to his village.
A. to work B. working
C. to have worked D. having worked
D
【解析】
试题分析:考查非谓语动词。for+一段时间,常与完成时连用,根据“for thirty years”可知,史密斯先生已经在这家工厂工作了30年,having worked相当于who has worked。故选D。
考点:考查非谓语动词
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