Who Is Warming This Globe?

The Teacher entered the classroom, Everyone started to greet in loud voices, The Teacher went straight to the blackboard and wrote: "WHO HAS WARMED THIS GLOBE? " There was pin drop silence as the teacher after writing Started to move from one desk to the other Glancing at each and every student. Some were moving their head side by side As if to say "NO" and some looked puzzled As to when this incidence occurred When the teacher stopped at one desk The student immediately stood up and said Teacher, I was down with fever for past 5 days Today only I came to the class. Teacher moved on and everybody thought Teacher is looking for the culprit. Teacher took a left turn and switched to next row Kept walking past each desk back to the blackboard and wrote again " "WHO…………". Pulled the chair and sat for a while glancing from first row to the last bench Students were looking at each other as if requesting the one to accept if they have done it. In all silence the teacher asked "Someone please close the doors". This silence remained for a few more minutes and then teacher Stood and went back To the blackboard and said: can anyone simplify this sentence and make it meaningful.