Dear Zhang wei,
I'm very sorry to hear you lost your father in the Wen Chuan earthquake.
Everyone can't be happy all the time.You are sad.It's normal to have this feeling.But it is useless to be sad!You'd better talk to your teachers and your classmates;You shouldn't be alone everyday.After school you should play with your friends;Why not listen to soft music or take part in activities?You may feel much better;Please talk to your mother and make her happy too;You should cheer yourself up.Study hard and you will forget sadness.
Everything goes well.
Yours,
Le Le