20. —Why was __ you lost all your keys?—It was because of my carelessness.
________ walk is expected to last all day, so bring ________ packed lunch.
I regret _________ you that you can't ________ the game.
All the staff in our company are considering _________ to the city center for the fashion show.
Ten people died in the car accident, two children _________.
__________ and happy, Tony stood up and accepted the prize.