Dear Mary
I haven't seen you for a long time. How are things going. In your last letter you talked about your mid-term examination. I know you are weak in English and want to study English well. How about your English now. Do you make a progess and catch up with your classmates? And how about your health now? Do you often eat enough fruit and vegetables? I hope you are in good health and you are good at all your school subjects.
That's all. I am looking forward to hearing from you.
Yours
Lucy