Write a letter to the school through a polite request and ask something you want to know.

Dear sir, my name is Stragon. I am a junior in Shimen High School. I will go to your school to get to know your environment. I will get there on the 20th. I want to know the details of the test. I want to thank you for giving me a lot of help. I look forward to your reply. Yours, sincerely, Stella