One morning, I was waiting at the bus stop, worried about__41__(be) late for school. There were many people waiting at the bus stop, __42__ some of them looked very anxious and __43__(disappoint). When the bus finally came, we all hurried on board. I got a place next __44__ the window, so I had a good view of the sidewalk. A boy on a bike __45__(catch) my attention. He was riding beside the bus and waving his arms. I heard a passenger behind me shouting to the driver, but he refused __46__(stop) until we reached the next stop. Still, the boy kept __47__(ride). He was carrying something over his shoulder and shouting. Finally, when we came to the next stop, the boy ran up to the door of the bus. I heard an excited conversation. Then the driver stood up and asked，“__48__ anyone lose a suitcase at the last stop？” A woman on the bus shouted, “Oh, dear! It's __49__(I)．” She pushed her way to the driver and took the suitcase thankfully. Everyone on the bus began talking about what the boy had done, and the crowd of strangers __50__(sudden) became friendly to one another.