英语作文假如你是李阳，你的朋友都要肥胖病向他提一些建议

Dear Mark,
Thank you for your letter .I am so happy that you share me your school life.
For your science competition,I think you'd better take a part in . Don't hesitate,seize the first opportunity that comes along.
Firstly,It's a nice chance for you to show your talent in science.Did you rember what you did in the last term ? Yes ,the wonderful models of the butterflies.
Secondly,you're full of the knowledge about science. More over, science is the subject that you like best.
Thirdly, you should take on this challenge, because it can make progress.
I think you can gain more as you can.Best wishes!
Yours Liyang