题目内容：

根据语篇情景，用恰当的短语或句子填空，使之意思完整。（每空2分，共6分）

After college when I moved to London, I was surprised at how polite everyone was in the subways. I was more touched when I traveled to Japan. In both places, people tried to (     1.   ). On moving stairs, everyone stood to the right and walked on the left. On elevater, everyone would stand over to the side and allow others to go out before they would begin to enter.

So, that is a polite social behavior: When we have to go up escalator, we will (  2.  ). That will give others who are in a hurry a choice of walking up the left-hand side of the escalator. When we are going to enter a elevater, the subway, or a doorway, we will wait for others to exit(离开) before ( 3.    ).