Question 51:         A. involve              B. control               C. tonight              D. purpose

Question 50:         A. disappear           B. arrangement      C. opponent           D. contractual

Question 49:         A. familiar             B. impatient           C. uncertain           D. arrogant

Question 48:         A. interfere            B. athletics             C. agrarian             D. available

He was asked to account for his presence at the scene of crime.
A. complain B. exchange C. explain D. arrange

Question 47:         A. polite                 B. roommate          C. diverse              D. apply

Question 46:         A. angry                 B. complete           C. polite                 D. secure

Question 45:         A. quality               B. solution             C. compliment       D. energy

Question 44:         A. continental        B. alternative         C. revolution          D. explanation

Question 43:         A. invention           B. obstacle             C. discover            D. bacteria