Alcohol is also classified as a downer (镇静剂), and though it is legal, it can damage the liver and do great harm if in large quantities.A.consumeB.to consumeC.consumingD.consumed
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D解析考查非谓语动词。句意“酒精也是镇静剂的一种，虽然是合法的，但是它也会对肝脏造成损害，如果大量吸收，会带来极大的伤害。”consume和alcohol是动宾关系，故用被动。相当于if it is consumed...。故选D。