The house, ______the walls are green, is where my grandfather used to live ten years ago.
The flowers his friend gave him will die unless _________ every day.
________, or we will be late for the meeting.
Though it was in the midnight, ________ there were a lot of people in the street.
The ground isn't wet. It ________ have rained last night.
We tried to find a table for seven, but they were all _______.