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