C30 If You Are Unhappy Then I Am the Happiest

Han Xichen walked into the teacher's office, full of doubts.

He knocked on the door and shouted, "Report!"

Three voices came from the door at the same time.

"Come in!"

Han Xichen walked into the teacher's office.

In the office.

Ms Yann was teaching mathematics, Teacher Wang was teaching history, and Teacher Zhao was teaching physics