-----Where _____you put the ruler? I can't see it anywhere.----I put it right here. But now it is ____.
When you do exercises, your heart works better. It is able to______ more blood while beating more slowly.
Before the final examination, many students have shown ____ of tension. Some have trouble in sleeping while others have lost their appetite.
It’s bad ____ for a man to smoke in the public places where smoking is not allowed.
One-room schoolhouses can still be found in _____ areas where there are no other schools for many miles.
The old man got into the _____ of storing money under the bed.