Team Kakashi are stunned to learn that Sai's true mission is to kill Sasuke.  Naruto wants to believe that the smile Sai showed them was real, but there is a possibility that it was all an act.
was probably all in
a day's work for him.
.ربّما كان عملاً قد اعتاد أن يقوم به
seguramente fue algo 
completamente normal para él.
seguramente fue algo 
completamente normal para él.
deve ser só um dia de trabalho para ele.
для него это в порядке вещей.