Suppose you are Li Ming , please write a letter to the University President about the Canteen Service on Campus. Your letter should cover these points : 1. food quality and price 2. your impression on the dining environment and canteen service Please note : you may praise the canteen service in your letter or you may criticize and suggest, or you can do the both. You should write about 100 words on answer sheet 2. Do not sign your own name at the end of the letter. Use 'Li Ming' instead. You do not need to write the address.