题文
–How did he finish the work?
--I hear that he did it _______.
| A．in the own | B．on the own |
| C．of his own | D．on his own |
–How did he finish the work?
--I hear that he did it _______.
| A．in the own | B．on the own |
| C．of his own | D．on his own |
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