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。

    One morning，I was waiting at the bus stop，worried about____  (be) late for school.

    There were many people waiting there， ____   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 ran up to the door of the bus.I heard an exciting 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 ways 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.

如图所示，甲、乙两颗卫星在同一平面上绕地球做匀速圆周运动，公转方向相同．已知卫星甲的公转周期为T，每经过最短时间9T，卫星乙都要运动到与卫星甲同居地球一侧且三者共线的位置上，则卫星乙的公转周期为（　　）

听觉是在下列哪个部位形成的（    ）