One day, 60 people were listening to a speech（演讲）. The 1 was talking about happiness. 2 , after a few hours, people started to lose their attention（注意力）. The speaker came up with an idea. He 3 his speech and asked all of the people to take part in a group activity.
He gave each person a balloon（气球）in the room and asked them to write his or her 4 on the balloon with a pen. Then his assistant（助手） 5 all of the balloons and moved them to another room.
When all 60 people walked into the room, the speaker told them to 6 the balloon that had their own name written on it. Everyone ran around, crazily 7 their own balloon. Many people even fell over. What a mess!
But after about five 8 of searching, 9 could find their own balloon. 10 seeing this, the speaker asked each person to collect a balloon and try to find the person whose name was written on it. Everyone started talking to each other and asking each other 11 their name. In just a few minutes, everyone had his or her own balloon.
"Can you see what happened?" the speaker said. "The balloons are like the 12 we look for in our own lives. Everyone is 13 looking for their own happiness, not caring what happens to others. But sometimes the best 14 to find happiness is to help others. Help 15 find happiness and you can find your own."
