You _____ if you had spoken the truth out. But you were as quiet as a mouse. [ ]

Which of these paintings was painted by thefamous artist Leonardo da Vinci _______.

Not until the stadium of Bird’s nest was completed in the end ____back to their normal position.

Please remain ______; the winner of the prize will be announced soon.

I wish I ___ able to tell him all about it last night. [ ]