语法填空：阅读下列材料，在空白填入适当的内容或括号单词的正确形式。
One morning, I was waiting at the bus stop, worried about _____ (be) late for school. There were many people waiting at the bus stop, ______ some of them looked very anxious and __________ (disappoint). When the bus finally came, we all hurried on board. I got a place next _____ the window, so I had a good view of the sidewalk. A boy on a bike ______ (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 _______ (stop) until we reached the next stop. Still, the boy kept ________ (ride). He was carrying something over his shoulder and shouting. Finally, when we came to the next stop, the boy came up to the door of the bus, I heard an excited conversation. Then the driver stood up and asked, “____ anyone lose a suitcase at the last stop?” A woman on the bus shouted, “Oh dear! It’s ______.” 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 ______(sudden) became friendly to one another.