I (come) in thinking I was well prepared but it was a mistake.

I came in thinking I was well prepared but it was a mistake.

Did I come in thinking I was well prepared but it was a mistake?

Who came in thinking he was well prepared but it was a mistake?

What did I think?

What was a mistake?

Did I or did Tom come in thinking I was well prepared but it was a mistake?

Did I come in thinking I or he was well prepared but it was a mistake?

Did I come in thinking I was well or bad prepared but it was a mistake?

I came in thinking I was well prepared but it was a mistake, did not I?