单选题 The illness from which Mary is suffering has now been ______ as hepatitis (肝火).
【正确答案】 A
【答案解析】本题考查动词辨析。diagnose“诊断”；determine“决定，断定”；deduce“推理，演绎”；discover“发现，发觉”。句意为：玛丽的病被诊断为肝火。