I can't believe that anyone would sink to such depths.
I can't believe that anyone can fall to such an extent.
I can't believe you'd tell a total stranger about it!
I can't believe you'd tell someone who's never known about this!
i can't believe
英[aɪ kɑːnt bɪˈliːv]
Beauty[aɪ kænt bɪˈliːv]
I don't believe it;