264. The invention of the coal-burning_______engine revolutionized industrial production in the 18th century and opened the way to the development of mechanized transport by rail and sea.
—Do you know if the foottball game has started yet? —Started? It must be certain who ________ by now.
—Did you enjoy the film? —Yes, it’s the best one I ________ these years.
—Will you go to the park now? —Not until I ________ my physics exercises.
—You must have met him the other day. —Oh, no, I ________.
—I’m sorry; I shouldn’t have been so rude to you. —You ________ your temper but that’s OK.