The firemen told us the difficulty they had ___ the fire ___.
—He is eager to try something he has never tried before.—Oh, I see. That’s _______ he’s different from others.
Last month, thousands of workers in that city went on _____ strike, demanding lower taxes and ______ end to cutting staff members.
--- How can you be late for such an important conference? --- Sorry! But my flight was ______ by fog.
So serious ________ that even the best doctors failed to save his life.
Their work ______, all the experts went out for relaxation.