阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式(不超过3个单词)。

    Once a group of 50 people was attending a seminar. Halfway____ his talk, the speaker stopped and decided____(create) a group activity. He went around the hall and gave each person a balloon. Each one was asked to write his or her name on the balloon____(use) a marker pen. Then all the balloons____(collect) and put in another room.

    The speaker then led the group to the room full of balloons and asked them to find the balloon that had their name____(write) on within five minutes.  Everyone was____(hurry) searching for their name, bumping into each other, pushing each other around. It was chaos. At the end of the five minutes no one could find their own balloon.

    Now each person was asked to randomly collect____balloon and give it to the person whose name was on it. Within two minutes everyone had their own balloon. When everyone quieted down, the speaker began to talk, saying that this is exactly____was happening in our lives.

    We may like to think of____(us) more important than others, but our happiness sometimes lies in the happiness of other people. Give them their happiness ____you will get your own happiness.