Read the excerpt about the effects of poison gas.Like some liquid the heavy-coloured vapour poured relentlessly into the trenches, filled them, and passed on.For a few seconds nothing happened; the sweet-smelling stuff merely tickled their nostrils; they failed to realize the danger. Then, with inconceivable rapidity, the gas worked, and blind panic spread.—British eyewitness on the western front, 1915
A
slowly and ineffectivelyD
quickly and ineffectivelyThe excerpt says that after only a few seconds, “the gas worked” with “inconceivable rapidity,” and blind panic spread. This shows the poison gas acted quickly and had an effective impact. The correct choice is “quickly and effectively.”
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