成人英语三级考试

【单选题】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

网考网参考答案：D
网考网解析：
[考点] 非谓语动词 [解析] 不定式表将来打算，现在分词的一般式表主动进行；从for twenty years(已经工作20年了)看，要用现在分词的完成式。所以选D项。 查看试题解析出处>>