They left here early and ________ by now.
Most of the evidence was destroyed in the fire. _____, it would be almost impossible to prove Jim guilty.
_____ life exists on any other planet in the solar system still remains a question.
It was almost midnight when a fire _____ in the neighborhood.
There is a peaceful and calm _____ in the country, quite different from that of a big city.
Jack was in low spirits those days and his friends did all they could _____ him up.