A. refuse B. refrigerator C. Russian D. occur A. flag B. primary school C. ammeter D. sawmill A. surely B. every C. unknown D. environmentalist A. discovery B. obstinately C. in D. businessman A. at the speed of B. seagull C. entertain D. diagnosis A. until B. planet C. towards D. academic A. communication B. poster C. plain clothes D. paper A. European B. loneliness C. play with fire D. garment A. giant B. maid C. vehicle D. invader A. plan B. aluminium C. eastern D. merry