If ________ for most of us, the meeting will be arranged next Monday evening.
I recognize her __I met her at the airport, although we haven’t seen each other for ten years.
Unless ________ to speak, you should remain silent at the conference.
_____ in Haikou for five years, he is not used to the weather in his hometown.
________ we know, the moon goes around the sun.
Eventually, the soldiers made ___ breakthrough and ____ D-Day landings were successful.