A. punctuality B. group C. skating rink D. should A. milkman B. track C. police station D. developer A. technological B. landfill C. cooking D. ski A. agency B. election C. respect D. grip A. concentrate on B. exciting C. general D. recite A. understand B. paratrooper C. unknown D. ghost A. robber B. predict C. gain D. ugly A. look back at B. health C. explain D. rock A. undulate B. noodle C. adjective D. worry A. abnormal B. heart C. calendar D. craftsmanship