秩序与生机：我们的校园方程式（补全短文）
Welcome to my school, dear friends! Let me t__1__ you some rules here.
First, we must arrive on time for class. S__2__, don’t run in the hallways — it’s dangerous. Third, keep the classroom c__3__: put rubbish in the bin. Finally, be kind to classmates.
If you n__4__ help, tell the teachers. Have fun!
根据首字母提示填写适当的单词完成短文