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----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

----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