At that time I had no idea ________ I could hand it to him without being seen.
I am not feeling myself today! We ____ have drunk that much beer last night.
--- What ____ have happened to Kevin? --- He might have run into some trouble.
If you want to catch your flight, you’d better ____ for the airport right now.
This song ____ me of my sweet childhood.
--- My watch is nowhere to be found. --- Don’t worry! I’m sure it will ____ sometime when you’re not looking for it.