_______ in the city for thirty years, the old man moved back to the countryside.

_______ in the city for thirty years, the old man moved back to the countryside.

1. A.
   Having worked
2. B.
   Working
3. C.
   To have worked
4. D.
   To work

._______in the city for thirty years,the old man moved back to the countryside.

  A.Having worked    B．Working    C．To have worked    D．To work

_________in the city for thirty years, the old man moved back to the countryside.

       A．Having worked   B．Working     C．To have worked       D．To work