Joke Collection Website - Cold jokes - One of the shortest jokes?

One of the shortest jokes?

It snowed heavily all night, and it still snowed in the morning. The teacher who saw WeChat just sent a message saying: I have a day off because the snowy road is slippery. I'm afraid some of them have arrived at school. Please reply when the children get home. In a short time, parents replied one after another: the child has arrived home. I glanced at my son, who was still under the covers, and replied: The child is back.