Classical novels often have ________ which add interest, tension, or deeper meaning to the  text; mist is one in Great Expectations.

Many people complain of the rapid _____ of modern life.

According to a UN report，one third of the world population have no    to clean drinking water and health care.

At the sight of the scene of war, my _____ race back more than 50 years to the dark days of 1940.

Hard work is no     of an excellent school record．You have to adopt a flexible approach to your learning．