A. keep on B. research C. return D. bathroom A. Berlin B. dialog C. for ever D. steepen A. Moscow B. because of C. modern D. shepherd A. jogging B. station C. elevator D. aircraft A. thunderstorm B. Rome C. evening D. baleen A. Stockholm B. library C. detective story D. dealer A. smartphone B. Geneva C. online D. from then on A. plenty B. hum C. unfortunate D. to be honest A. recreation B. health C. look out for D. Seoul A. catch B. oil C. cucumber D. grow