Present Perfect vs Past Simple з маркерами часу

It's been a month ___________  we last had a meal together.

We haven't seen each other _______ years.

I think I've been here ________.

The accident happened 10 years _________ .

A: Have you tidied your room ________?

B: No, I'll do it later.

Mom, I have ________ tidied my room. Can I go out now?

I don't want coffee, thanks. I've ________ had one.

We haven't found a solution ______ .

Have you ___________  imagined how life would be without having to work?

I've ____________ been to Prague. I'd love to go one day.