—Why was Professor Johnson unhappy those days? —Can't you see it clearly? The only reason was that the theory he stuck to_____ wrong.
Professor White has written some short stories, but he is _____ known for his plays.
Attention, coffee lovers! We have for you, the best coffee machine ___ invented.
—You must have met him the other day. —Oh, no, I ________.
You can’t imagine what difficulty we had ______ home in the snowstorm.
—Which driver was to blame? —Why, ____! It was the child’s fault, clear and simple. He suddenly came out between two parked cars.