SmArT QuIzz

It's all about being a smart person so if you are good enough, give a shot!
As you know, studying abroad is abit different from studying in our own countries; therefore, teaching style and how teachers speak is also differ from what we've experienced. Here is a scenario where the quizz begins; One of the students in the class names Oscar, he has been doing well in class - answering questions actively, but that didnt last long until one day he felt so frastrated and started being a passive student. From time to time, the teacher didnt feel well until the rage in his mind exploded and said " Sad but ****. If no brain, don't speak". He hasn't realized that Oscar hasn't pre-reading recently that's Y he couldn't answer the questions.
Well... abit of scenario here, so just make a guess.
Good Luck mate!!