Antarctica holds 90% of the world’s ice, and most of its fresh water (70%) is in a frozen          .

The news of the war brings little __________ of peace.

Before the final examination, many students have shown ____ of tension. Some have trouble in sleeping while others have lost their appetite.

Working hard is not only a_____ of a great success, but is among the essential requirement.

—You are always full of ____. Can you tell me the secret? —Taking plenty of exercise every day.