Choose just, yet or already to fill in the gaps.
1. I'm sorry. You have________ missed Katie. She left the office about three minutes ago!
2. Oh, nothing for me, thank you. I've _____ eaten. I had dinner less than an hour ago.
3. This book has _______ arrived. It's what you wanted.
4. You won't believe this but I've _______ seen a ghost.
5. We haven’t found the answer ________.