The woman was about to open the door _______ she heard a strange sound from inside.
–I must apologize for _____ ahead of time. –That's all right.
The Olympic Games, _____ in 776 BC., didn’t include women players until 1912.A. first played B. to be first playedC. first playing D. to be first playing
_____ into use in April 2000, the hotline was meant for residents reporting water and heating supply breakdowns.
Having been attacked by terrorists, _____.
The disc, digitally _____ in the studio, sounded fantastic at the party.