题文
The ship would have sunk with all on board ______ for the captain.
| A．if it was not | B．had it not been |
| C．if it has not been | D．not had it been. |
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The ship would have sunk with all on board ______ for the captain.
| A．if it was not | B．had it not been |
| C．if it has not been | D．not had it been. |
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