1. Since the Romans failed to ____ the tribes in Northern Britain, they built a wall to ____ the tribes.
A. conquer - alienate
B. impress - intimidate
C. subjugate - exclude
D. pacify - enrage
E. neutralize - barricade
2. The professor became increasingly ____ in later years, flying into a rage whenever he was opposed.
A. taciturn
B. voluble
C. subdued
D. contrite
E. irascible
3. Although the deep sea has a typically ____ fauna, near vents in the sea bed where warm water emerges live remarkable densities of invertebrates and fish.
A. verdant
B. unique
C. lush
D. pallid
E. sparse