Dear Father,
It has been a long time since my last letter for you. I heard that this period of time has been very busy for you. I know you are under a heavy burden.you need to raise this big family. you need to earn money to pay my education and care for the whole family. you are the most one I need to say thanks and the most respectable one for me. I want to say please have some rest. I have grown up. father,thank you.I love you.
sincerely,
son Bob