Tony live ____the 16th floor but he never uses a lift to go

1.Tony lives (on) the 16th floor but he never uses a lift to go (up)and(down).
【翻译】汤姆住在16层,但他从不使用电梯上下楼.（具体某一层前须用介词on；楼主,应该是lives而不是live吧）
2.(By) the way,why did you buy such funny clothes?
【翻译】顺便问一下,你为什么买这么有趣的衣服?
3.Hello!Could I speak (to) Allen,please?
【翻译】你好!请问我可以和艾伦说话吗?

Tony live （in) the 16th floor but he never uses a lift to go (up)and(down).
(By) the way ,why did you buy such funny clothes?
Hello! Could I speak (to) Allen , please?

on, ,by ,to

Tony live __on__the 16th floor but he never uses a lift to go ___up__and_down____.
__by___ the way ,why did you buy such funny clothes?
Hello! Could I speak __to____ Allen , please?
都是基础的词组，不会有错的。