---How many ________ are there in your school?  ---There are fifty-five.

The purpose of the campaign is to raise the public’s_______ of the dangers of passive smoking.

The advertisements in newspapers help to cut the _____ of making the newspaper.

In modern society people have to pass various test for professional          so that they can be qualified for a good job.

At times, worrying is a normal________ to a difficult event or situation—a loved one being_______ in an accident, for example.