—I stayed at a hotel while in New York. —Oh did you? You with Barbara.A. could have stay

问题补充：

—I stayed at a hotel while in New York.

—Oh, did you? You with Barbara.A. could have stayedB. could stay C. would stayD. must have stayed

答案：

表示对过去情况的推测：“你可能和Barbara住在一起了”；must语气太肯定，与前面具有疑问语气的Oh, did you?不符。