在一所学校的宿舍里住着四个人,由于快要毕业,所以大家都在为找工作的事情忙碌着。为了不影响别人的休息,宿舍里的人经过商量后决定:由最后一个进宿舍的人负责把门锁好。但是有一天清晨,大家起床的时候才发现由于昨晚没有锁门,有窃贼进入宿舍,偷走了床铺离门最近的甲的手机。于是,大家争论不休,都说自己不是最后一个进宿舍的。最后,他们如实讲述了昨天晚上进入宿舍的情况。甲说:“昨晚我进宿舍的时候,丙正在宿舍里洗脚。” Four people live in a school dorm, and everyone is busy getting jobs. In order not to affect other people’s rest, the dorm room after discussion decided: the last person into the dormitory to lock the door. However, one day when we woke up, we found out that there was a thief who entered the dormitory last night and stole his mobile phone nearest to the door. So, we endless arguments, say that they are not the last one into the dormitory. Finally, they honestly talked about entering the dorm last night. A said: “Last night when I was in the dormitory, C was washing her dorm room.”