_________ last as his coach suggested, he wouldn’t have narrowly escaped being killed.A.Hadn’t the skydiver exitedB.If the skydiver hadn’t exitedC.Should the skydiver not exitD.If the skydiver wouldn’t exit
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B解析从主句wouldn’t have narrowly escaped判断本句为对过去事情的虚拟语气，从句可用if sb. hadn’t done 或 had sb. not done的结构。