阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或者使用括号中词语的正确形式填空。

Mr Jones had a few days’ holiday, so he decided to go on a trip. He put  ____ his best clothes, took a small bag, ____(go) to the train station and got on the train. He had a 18. ____(beauty) hat, and he often put his head out of the window ____(see) the mountains during the trip. Suddenly, the wind  ____(blow) away his hat.

  Mr Jones  ____(quick) took his bag and threw it out of the window.. ____(other) on the train laughed and said, “Is your bag going to bring your hat  ____?”

  “No,” Mr Jones answered, “but there is no name or address on my hat, and there ____(be) a name and ____ address on the bag. Someone will find both of them, and he will send the bag and the hat back to me.”

将一圆形纸片沿半径剪开为两个扇形，其圆心角之比为3：4．再将它们卷成两个圆锥侧面，则两圆锥体积之比为（　　）

世界地理未解之谜举例：____、____、____。

____