A. world B. till C. corner D. better A. inhabitant B. ministry C. gilt D. have breakfast A. picnic B. gunpowder C. metre D. crane A. AIDS B. atlas C. seldom D. invariably A. lab B. have a good time C. pirate D. landscape A. volcanologist B. need C. show around D. pencil-box A. betray B. hotline C. have fun D. format A. cooperate B. learn C. different from D. nut A. flaw B. wake up C. twenty-first D. feel A. ticket office B. thanks C. concentration D. each other