The World Health Organization gave a warning to the public without any ____when the virus of H1N1 hit Mexico in April, 2009.

As a parent, you ought to set a better _____ to your children, who learn bad behaviors quickly.

Please read the _____ on the bottle of the medicine carefully and pay attention to the amount and the time to take the medicine．

—Li Lin is very bright and studies hard as well.—It’s no ______ he always gets the first place in any examination.

She wasn’t a much older tennis player but he had the great ______ of experience about games.