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    精英家教网 > 高中英语 > 题目详情
    If _________, the bird flu would produce a powerful poison that would kill the patients.
    A. not treat         B not treated         C untreated          D. Both B and C
    D
    考查省略句，主从句的主语一致时，可以省略从句的主语和be动词，选B就是if it is not treated的省略，选C就是if it is untreated的省略，所以选D。
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