阅读下面短文，根据语境、音标或所给单词的提示，在每个空格内填入一个恰当的词，要求所填的词意义准确、形式正确，使短文意思完整、行文连贯。

Mark Twain (马克·吐温) was an American (作家) . He was always  ['bɪzi]. He always  (forget) to do something.

One day he went to a city by train. He wanted to  one of his friends there. When he was on the train, the conductor (列车员) asked him  his ticket. Mark Twain  for his ticket here and there, but he couldn't find it.

The conductor  (know) Mark Twain. She said, " me your ticket on your way back. And if you can't find it, it doesn't  ['mætə]."

"Oh, but it does," said Mark Twain. "I must find the ticket. If I can't find it, how can I know I am going?"