A. costume B. cut down C. Chinese book D. sang A. pollution B. military C. electrode D. inflatable A. frightening B. kid C. end up D. fortnight A. conduct B. desertification C. trail D. loop A. absolutely B. do the dishes C. slowly D. hide A. our B. manner C. campaign D. pole A. hybrid B. unrealistic C. generous D. mass A. lines B. selfish C. twenty-eight D. chemical A. environment B. weightlessly C. crawl D. watertight A. nail B. be caught in C. school begins D. such that