The old man,_______ abroad for 20 years, is on the way back to his mother land.

The old man,_______ abroad for 20 years, is on the way back to his mother land.

The old man,_______ abroad for 20 years, is on the way back to his mother land.

1. A.
   to work
2. B.
   working
3. C.
   having worked
4. D.
   to have worked

The old man,_______ abroad for 20 years, is on the way back to his mother land.
  A to work  B working   C to have worked   D having worked