【正确答案】Dear Leslie, I am writing to inform you of our next class, which is about poetry of the Tang Dynasty. We will have it this Friday, in Classroom 602, Building6. In order to learn it better, you need to do the following things before the next class. At first, please read some materials about poetry of the Tang Dynasty, which plays an extremely significant role in our literature. You can find some original poems of famous poets, such as Li Bai and Du Fu. Besides, knowing the history of the Tang Dynasty will be of great benefit for you to understand the background of the poems. You are so diligent and I am glad to teach you. I sincerely look forward to our next class and your reply. Yours, Li Hua.