A. dirty B. sigh C. skateboard D. tourist A. tooth B. some day C. programme D. its A. discuss B. complex C. a chess set D. taxi A. enhance B. narrow C. terrible D. wheel A. on the way out B. weather forecast C. incident D. day and night A. fond B. stand up C. rough D. cough A. crucible B. incredible C. boil D. mainstream A. adolescent B. invaluable C. occurrence D. serious A. there is B. music video C. successful D. worry A. have a cold B. vitamin C. belly D. blindness