The old man, abroad for twenty years, is on the way back to his motherland.A. to workB. w

The old man, abroad for twenty years, is on the way back to his motherland.
A. to work
B. working
C. to have worked
D. having worked

A. to workB. workingC. to have worked(答案→)D. having worked解析：句意为：那个老人，在海外已经工作了20年了，现在正在返回祖国额路上。动词的非谓语形式也有时态和语态的变化。结合句意可知，空白处句法上相当于结果状语的功能，应用非谓语形式的完成时，主语和谓语为主动关系，结合句意：D为最佳选项考点:考察动词的非谓语形式的用法

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