The ship would have sunk with all on board for the captain.A. if it was not B. had it not

问题补充：

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.

答案：

A. if it was not

(答案→)B. had it not been

C. if it has not been

D. not had it been.

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