A. Punishment
B. trial
C. accusation
D. execution
A. indispensible
B. useful
C. ineffective
D. available
A. clear the vision
B. remedy snow-blindness
C. ease the irritation
D. loosen the muscles
A. concentrating to the solid white terrain
B. searching for something to look at in snow-covered terrain
C. providing the eyes with something to focus on
D. covering the eyeballs with fluid