_______, the disease diphtheria would produce a powerful poison that would kill

题干

_______, the disease diphtheria would produce a powerful poison that would kill the paient.

A．If untreated

B．If it untreated

C．To be untreated

D．If being untreated

上一题下一题 0.85难度单项选择更新时间:2010-09-02 10:32:54

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