This is a Chinese class, but the class teacher has something to do and can't return to the classroom for ten minutes. During those ten minutes, the students were noisy, some were running around the classroom, some were chatting, and some were reading. Xiao Ming, as a scout, went to see if the teacher had come back. After about five minutes, the students immediately ran back to their seats and sat down, but the scout tripped as soon as he entered the classroom door. He broke out in a cold sweat and looked out. Oh, what a false alarm! It turned out that Xiao Qiang, the deskmate, hurried back to the classroom, and no one knew when he slipped out of the classroom. Xiao Qiang laughed: "Haha, do you think I am a teacher?" Suddenly, the classroom became lively again. Just as we were having the best time, a girl shouted, "Be quiet, cherish time and have a good look at the text before the teacher comes." Good publicity is useless. The classroom is still so lively.

After a while, footsteps came from the stairs again, and the students immediately took their positions in the right posture. Suddenly, there was no sound, no excitement, no noise. The teacher really came. When the teacher came into the classroom, he found that the students were reading and practicing calligraphy, so he walked to the podium with a smile. But the teacher knows that the students' books have been "read" backwards. Because of nervousness, the handwriting is like "snake". Ten minutes ago, it was even noisier here!

Class is over, and no one tells the teacher. The students all said it was ten minutes before the teacher came. It was really fun.