英语作文"Change my bad habits"有吗?

Korea TV sitcoms are always attractive,too many people love them,me too.i remember when i have summer vacation or summer vacation,i also watched them with my mother.
But ,you see.we are young,it's better for us go outside to commuicate with others and to realize the society,not to stay at home,not to sit before the computer or TV.
For me ,i also have bad habits,the poorest one is that everyday,i sit before the computer for nearly 8 hours.
i think i have to change this bad habit which is not good for one's health.
以上是初三水平的.
i used to have a bad habit-- i often played computer games,nearly every day.Because of that,i hardly ever studied,and i got a bad grade.
yesterday,my mother told me,if i can pass the final exam,she will take me to the America.so i really want to have a good grade.and i know i must change my habit.
now,i don't play the computer games,and i study very hard.i believe i can get a good grade.
以上水平是低一点的.