请你从下面的方框里挑选合适的词填空。

Daniel：Would you like to live on Mars, Ann?

Ann：No, I wouldn't．

Daniel：Why not?I think it would be exciting．

Ann：I think it would be 　　1　　．We could 　　2　　 go outside or do outdoor sports．

Daniel：I know it's very cold on Mars, but we could 　　3　　 inside because everyone wouldn't live in very big houses．

Ann：Where would we 　　4　　 water?There's no water on Mars．

Daniel：We could 　　5　　 ice to make water．I think 　　6　　 on Mars would be an adventure．

Ann：But if robots do all our work for us and you couldn't go 　　7　　, what would you do all day?

Daniel：I would write a book about life on 　　8　　．Then I would sell it to people on Earth and become rich．

Ann：That's a good idea．I think lots of people would buy a book 　　9　　 that．

1．________　2．________　3．________　4．________　5．________

6．________　7．________　8．________　9．________