根据所给提示，完成句子。每空一词，含缩略词。
There was a football match on TV last night.(变为一般疑问句）
____ a football match on TV last night ?
He’s been in China since ten years ago.(变为否定句）
He  ____ in China since ten years ago.
Tom got up early in order to catch the first bus to Chongqing.(同义句）
Tom got up early ____  he could catch the first bus to Chongqing.
Steve will finish his book in a month. (对划线部分提问）
____ will Steve finish his book?
____ 邮件英语是一种为了节约时间而正在被使用的书面语。（完成句子)
E-mail English is a kind of _______   English which is being used to  ______  time.

瑞士中学教师巴尔末成功地从光谱数据 $\frac{9}{5},\frac{16}{12},\frac{25}{21},\frac{36}{32},\cdots$ 中得到巴尔末公式，从而打开了光谱奥秘的大门．请你尝试用含你n的式子表示巴尔末公式____．