A. teacher B. on the whole C. shake D. greatly A. visitor B. resolve C. encourage D. put through A. loose B. safely C. harbor D. leather A. take for granted B. extinction C. headmaster D. into A. complication B. argue C. appoint D. disappoint A. unrealistic B. safety belt C. flashlight D. arm in arm A. yard B. disregard C. predict D. alone A. part-time B. requisite C. experiment D. double-decker A. ferment B. solve C. troublesome D. January A. cylinder B. flash C. man-made D. at