What? is it true that you win that competition?
hah? you win that international competition?
really? that must be wrong!

semoga membantu :)
Dina : Hi dani did you know that everyone in this school is talking about you because you are the winner of the sains olympiad?
Dani : Wow, what a surprise i can't believe it
Dina : Yeah you are the winner good job my friend
Dani : Thanks a lot dina
Dina : You're welcome dani