快三对打套利法简介：Originally, the first and second periods were Old Man Yan's Chinese class, and the third period was boring math class. Finally, in the fourth period, he was able to take Teacher Li Bingmiao's English class, but Old Man Yan came again.
Originally, the first and second periods were Old Man Yan's Chinese class, and the third period was boring math class. Finally, in the fourth period, he was able to take Teacher Li Bingmiao's English class, but Old Man Yan came again.
