, the disease will produce a powder poison that will kill the patient.A．If it untreated B．If is untreated C．If being untreated D．If untreated 题目和参考答案——青夏教育精英家教网—

题目内容

, the disease will produce a powder poison that will kill the patient.

A．If it untreated	B．If is untreated
C．If being untreated	D．If untreated

解析试题分析：句意：如果不得到治疗，这种疾病将会产生杀死病人的粉末状病毒。完整形式为：If the disease diphtheria is untreated…，从句的主语与be动词省略了，选D。
考点：考查状语从句的省略

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