A. contamination B. favour C. Mid-Autumn Festival D. velvet A. into B. odds C. Ireland D. discredit A. healthy B. point to C. am D. bactericidal A. alcohol B. annoying C. senior D. in the meantime A. global warming B. weaken C. virtual D. fluently A. eight B. methylated C. Arctic D. sophistication A. side road B. carbonated C. the Dragon Boat Festival D. guard against A. ethanol B. by taxi C. make use of D. after school A. sewage B. sleeping C. subjective D. administration A. run-down B. under construction C. useless D. lion dance