答案：One possible version：Hello，everyone. I'm glad to be here to tell you something about my school life. I'm Sandy. I am 12 years old and I come from Class 1，Grade 7. I am tall and slim，and I wear glasses. Our school has modern classroom buildings and a stadium. My favourite place is the library，where I often spend time reading. We have different subjects，and my favourite subject is Science because it is fascinating and helps me understand the world better. I join the Science Club because I love doing experiments. Our teachers are friendly and care about us. My classmates are hard-working and helpful. For example，we always help each other with homework. In our free time，we enjoy watching volleyball matches together. My dream is to become a scientist，and I hope to make great contributions to the world in the future.