Su Qingbei wanted to change her ways and become a tutor. The first child who joined her asked her: Senior sister, is it difficult to pass Level 4 or Level 6 in college? Su Qingbei thought to himself, this is such a studious kid: Fortunately, with your college entrance examination foundation, you should be fine in CET-4. Child: I thought about it, Level 4 is too low. I don't plan to take Level 4. I can just take Level 8 when the time comes. Su Qingbei:? ? ? In the first class meeting, she was speaking on the stage. Suddenly a boy in the back row raised his hand, Su Qingbei: Classmate, is there anything you don't understand? The student: Teacher, I want to go to the toilet. Su Qingbei:? ? ?