A. contribution B. pioneer C. used D. instead of A. complicated B. soft drink C. the Potala Palace D. alpinist A. forty B. blindfold C. indulge D. differ A. limited B. right now C. step D. linen A. load B. commission C. teaspoonful D. authoritarian A. by bus B. perilous C. entrance D. major A. infections B. boast C. syllable D. bottom A. chicken B. climb on the window ledge C. attain D. paperwork A. churn B. earn one's living C. solitary D. selfish A. lotto B. bravery C. control D. exception