dear zhang lin.
i'm happy to have received your letter.now i'm writing to express my thanks for your care and tell you something about my study and life.
in the first place,what has been changed most is my attitude.as you know,i used to be lazy.nevertheless,i spare no efforts to learn every subject,for i know exactly that attitude determines your destination.to be honest,i do feel the burdens on my shoulder become heavier.
moreover,my daily schedule is completely different from what it used to be.occupied in study all day long,i have no alternatives but give up my favorite tv programs and games.
ultimately,let me show you my future plan.firstly,lacking in skills od solving math problems,i find it essential to spend time improving it.futhermore,nver should we ignore the vital importance of our physical health,thus,i'm determined to work out once a week.
best wishes.
yours li hua