"(@^▽^@)" <popai_00@hotmail.com> wrote in message 
news:cirp2t$2nj5$1@news1.wakwak.com...
> 何でjapanなのに英語が多いのだろう?

I think if you begin with 何で rather than どうしてyou characteristically 
end the sentence with やろう rather than だろう.

But thats just my opinion. In the end, you're the native やろう?