A. flow B. distinct C. introduce D. reply A. lecturer B. zone C. centimeter D. hard A. doctor B. coal C. butterfly D. inquire A. fascinating B. wait C. anti D. bring out A. say B. sense C. airfield D. film A. improvise B. tramp C. luck D. overheads A. go to bed B. truant C. word D. popular A. Olympic B. be supposed to C. grievance D. agree with sb A. strength B. both C. queue D. make a sentence A. multiply B. DVD C. mouth D. at all