______ that you were out, I wouldn't have bothered to come all the way at that time of night.

【正确答案】 C

【答案解析】 根据句意，此处应使用虚拟语气，且由主句中谓语动词为“would have done”形式可知，此处表示对过去事实的虚拟，因此条件句中谓语动词应为“had+过去分词”形式，选C。