Good news was sometimes released prematurely, with the British recapture of the port ________ half a day before the defenders actually surrendered.
句意：好消息有时过早的泄露出来，在敌人真正投降的半天前，就传出英军重新夺回了港口的消息。the British recapture of the port是被宣布的消息，故此处announce 应为被动形式，前面有with，所以此处无需系动词。因此，本题的正确答案为B。