猜数字游戏中，小明写出如下一组数： $\frac{2}{5}$ ， $\frac{4}{7}$ ， $\frac{8}{11}$ ， $\frac{16}{19}$ ， $\frac{32}{35}$ …，小亮猜想出第六个数字是 $\frac{64}{67}$ ，根据此规律，第n个数是____．

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。

    This story took place in 1903. Adam, an American businessman, was carried out to sea by a strong wind. A ship ____ (spot) and rescued him, ____  was how he got to London by accident. He at once went to the American embassy ____ (ask) for help, but was refused. Two rich gentlemen invited him home because of a bet. They asked Adam a few questions, and Adam responded ____ a polite manner. They gave him a letter and asked him not to open it until two pm. Adam left wondering ____ would happen to him.