问题
选择题
_______, 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
答案
答案：A
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_______, 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
答案：A