----How did he finish the work?

----I hear that he did it __________

1. A.
   in the own
2. B.
   on his own
3. C.
   of the own
4. D.
   all his own

----How did he finish the work?----I hear that he did it __________

----How did he finish the work?
---- I hear that he did it __________

----How did he finish the work?

---- I hear that he did it __________

A．in the own         B．on his own         C．of the own         D．all his own