As a recent study shows, once the H1N1 flu patients _____ to hospital, the elderly have a higher risk of dying. —— 职业资格>教师资格证 > （初中）英语学科知识与教学能力

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单选题 编号：6119492

1.As a recent study shows, once the H1N1 flu patients _____ to hospital, the elderly have a higher risk of dying.