A. bactericidal B. waste C. underground D. generate A. cruel B. ambassador C. path D. go back A. whiteboard B. useful C. venture D. human A. outgoing B. absurdly C. white D. thirsty A. chopstick B. kilometre C. post office D. musician A. Mrs. B. grateful C. safeguard D. wake A. vehicle B. garden C. look ahead D. take up A. fox B. headmistress C. bargain D. at the top of A. medical B. square C. language D. left-handed A. plank B. somebody C. reluctant D. hami melon