in the dark 一无所知；不了解情况
——Do you have any idea what this notice is about?
——I’m as in the dark as you are.
1.She is still in the dark and doesn't know about it at all, for Jack is trying to keep it from her.
2.I'm as much in the dark as you are.
3.I didn‘t know.I was only a shot in the dark.
4.Soldiers are often left in the dark as to where they will be deployed or what they will be expected to do.