_____,thediseasediphtheriawillproduceapowderpoisonthatw...

問題詳情：

_____, 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

知識點：倒裝與省略

題型：選擇題