1. (2021九上·重庆期中) 根据语段，在短文后的空格处填上一个恰当的词，使短文完整通顺。

An old man walked slowly into a restaurant his cane(拐杖). His old jacket and shoes made him look unusual that day.

A young waitress named Mary watched him move towards a table by the window. She ran over to him，and said with a smile, "Here, sir. Let me give you a hand." Without a word, he just gave her a smile, too. She pulled the chair away from the table and helped him sit down. Then she his cane against the table where he could reach it. In a soft and clear , the old man said, Thank you, miss." "You're welcome, sir," "she replied, "I'll be back in a moment, and if you need anything, just wave(朝….挥手) at me!"

he had finished a good meal, Mary brought him the change. She handed him his cane, and walked with him to the front door. Holding the door open for him, she said, "Thank you for coming to our restaurant! Welcome to come again, sir!"

The old man turned around and smiled.

When Mary went back to clean his table, she was very , Under the plate, she found a business card, a 100-dollar bill and a note. The note said, "Dear lady, respect you very much, and you respect yourself, too. It shows the way you treat and yourself. You have found the secret of happiness."

In fact, the old man was the owner of the restaurant. That was the time that she, or any of his waitresses, had seen him.