The bell rang for dismissal but you stayed after studying since you were failing

After a few minutes of silence he asked you something

"Are you failing on purpose?"

He looked at your shocked expression and handed you your test

"You knew all the answers and got them all wrong on purpose, didn't you? I know you're smart."

He placed his hand on your chin and lifted your head up

"So tell me... Are you failing on purpose?"

He gave you a serious look while staring at your lips