I ask you!

something that you say in order to show your surprise or anger at something someone has done

这叫什么事啊!(表示吃惊或愤怒)

They stayed for a month and left without even saying thank you! Well, I ask you!

他们住了一个月却连句谢谢都没说就走了。这叫什么事啊!

That silly old bat. I ask you, who does she think she is?

那个愚蠢的老家伙。你说说，她以为自己是谁?