您好,以下是本人按题目要求写的英语作文供参考,希望对您有帮助：
Dear Sir/Madam:
My name is Li Hua, a Senior Grade 3 student from Xinhua High School. I am writing to inquire a book on your Amazon.com webiste called Practical English Usage. I am interested in the book and I want to know the price for it, and if there is a discount, please let me know.
Your timely response is highy appreciated.
Sincerely,
Li Hua
Dec.23, 2011