I will see myself out, please.请留步,不用送了!
Hope you’ll visit Beijing more often.欢迎以后多来北京!
Hope you’ll come again.欢迎再来!
Hello.你好!
Go straight this way. 简直往前走。
Don’t open your book. 别打开书。
Do you understand 你明白了吗?
Distinguished/Honorable/Respected friends尊敬的朋友们!
Close your book,please. 请把书合上。