Midterm of Biology

Because I played games too often, I did not study the biology. Finally, I just can spend four hours sleeping everyday before the midterm of biology. After the midterm of biology, the first thing I wanted to do was to sleep. After this experience, I wished I could study hardly on normal in order not to like this, but I much thought I would still play games and only sleep four hours for final. This can say the leopard can't change its spots.