题目内容：

根据对话内容,写出句中所缺单词

1.-Why did you go to Beijing last week?

-Oh, I went there on _______. I talked about a project with other companies.

2.-Come on. We only have 5 miles left.

-I'm _______ out and I can't go any further.

3.-It's dangerous. You should tell your brother not to go sailing alone.

-But he has already made up his _______ to do so.