填空题：One morning, I was waiting at the bus stop, worried about56(

One morning, I was waiting at the bus stop, worried about56(be) late for school. There were many people waiting at the bus stop,57some of them looked very anxious and58(disappoint). When the bus finally came, we all hurried on board. I got a place next59the window, so I had a good view of the sidewalk. A boy on a bike60( catch ) my attention. He was riding beside the bus and waving his arms. I heard a passenger behind me shou- ting to the driver, but he refused to stop61we reached the next stop. Still, the boy kept62(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,"63anyone lose a suitcase at the last stop?" A woman on the bus shouted, "Oh, dear! It's64(I)". She pushed her way to the driver and took the suit- case thankfully, Everyone on the bus began talking about what the boy had done, and the crowd of strangers65(sudden) became friendly to one another.
阅读以上短文,回答题.
第56题应填__________