Some so-called climate travelers _______ in one place for a few months and then move on to some other places as the weather changes.
As we all know, smoking ___________ people’s health.
_____ you have worked out the first problem, you may go on to work on the second.
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.