他在利用你，难道你看不出来？

Can't you see (that) he's taking advantage of you?

《牛津词典》

哦，难道你看不出来，如果这是个秘密该有多好吗？

Oh, don't you see how much nicer it would be if it was a secret?

youdao

难道你看不出来人家不爱听么？

Can't you see they're annoyed?

youdao