The pilot kept calm in the terrible storm otherwise the accident .A. couldn’t be prevente

问题补充：

The pilot kept calm in the terrible storm, otherwise the accident .

A. couldn’t be prevented

B. mustn’t have prevented

C. wouldn’t have been prevented

D. shouldn’t prevent

答案：

A. couldn’t be prevented

B. mustn’t have prevented

(答案→)C. wouldn’t have been prevented

D. shouldn’t prevent

解析：根据句意“幸亏飞行员保持镇静，要不然这场事故是不会避免的”，对过去的推测。