* your hard work；
* How you read about jogging in your English textbook；
* The advantages ofjogging；
* THe need for a pair fo quality shoes；
* The price of the shoes you plan to buy；
* THe time you need the money；
* Your appreciation for his help
Dear dad,
I am writing to you for help which I have come to a desperate need. You know I always want to be healthy and in geat shape，so I can pay more attention to teacher's instruction. Yesterday，I went to library and read some books about jogging. I think I need a good jogging shoes for my exercise. I believe a strong body can enhance my study as described by our textbook.
I have found a cheap price of a pair of jogging shoes which cost only $500 nearby school. Daddy，you will help me buy this pair，wont' you？ The on sale may not last for long. Please send money as soon as possible，so I can start my jogging right away. I know you will fulfill my dream and expect my endeavor. I promise I will do my best on my study and exercise. Thank you for your consideration. Take care and wish you happiness.
Yours beloved son.
