It was ______ to go down the hills.

There are certain _______when you have to interrupt people who are in the middle of doing something.

To make members of a team perform better, the trainer first of all has to know their ___and weaknesses.

Mary is a good girl, but she has some___________. For example, she doesn’t like helping others.

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