翻譯一句英文PLZ

問題:What are you up to here so late then?~~~~~

答案:你為什麼這麼晚才來呢?














選我~~~~~選我~~~~~選我~~~~~選我~~~~~選我~~~~~選我~~~~~

什麼是您到這裡這麼晚呢？

What are you up to, here so late, then?

2014-05-27 07:28:21 補充：
up to - occupied / busy with 忙着
What are you up to你正忙着做甚麼事
here so late這麼晚在這裡
then那麼
What are you up to, here so late, then?
那麼，你這麼晚在這裡正忙着做甚麼事呢？

What are you up to here so late then?
當日為甚麼你會遲到這裡呢?

What are you up to here so late then?翻譯成中文是：你為什麼這麼晚才來到這裡呢?

What are you up to?
+ here so late?=by the two separate phrases
=here on=here upon=adv
=here in=adv=by the phrase means by Translation from E/C
為何遲到?
What's E/C?

你點解遲到?????