Though sometimes -------, all too often technology is seen as a ------- for the great economic, social, and political challenges facing the nation as it embarks on the path of modernization.

A．braggart:humble
B．dupe:compliant
C．liar:dishonest
D．benefactor:selfish
E．lumber:inflammable

A．athlete:compete
B．salary:tax
C．stake:gamble
D．production:invent
E．role:act