C77 This Can't be American Chewing Gum

"What are you arguing about? Don't you know about class?" At this moment, the form teacher of Grade 12 Class 6 arrived in the classroom. He saw that the students were all discussing quietly below and did not look like they were going to class at all.

When they heard their form teacher and her voice, they all shut their mouths. They did not dare to offend their form teacher at all