--- I want to know whether we shall go skating today or tomorrow.--- Does that make any _____?
Our bodies are strengthened by taking exercise. ______, our minds are developed by learning.
American Indians ______ about five percent of the U.S. population.
The problem of global warming is serious. ______, the sea levels have risen a little.
At the beginning of class, the noise of desks ______ could be heard outside the classroom.
Yesterday morning he got up earlier than ______, for it was not a(n) ______ day.