_____,thediseasediphtheriawillproduceapowderpoisonthatw...

问题详情：

_____, the disease diphtheria 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

【回答】

D

知识点：倒装与省略

题型：选择题