Psychologists maintain that the nature of human beings entails a strong need to ______their free time; idleness can be as stressful as activity.

A． garnet : mineral
B． granite : plant
C． nucleus : cell
D． iron : colorant
E． paper : consumption

A． melancholy : positive
B． receptive : persistent
C． sardonic : charitable
D． furtive : stealthy
E． traditional : novel

A． drill : authority
B． demur : objection
C． shudder : congeniality
D． snore : thunder
E． confront : intractability