Notuntil

問題詳情：

 Not until ________ in the river, ________ how serious the pollution was.

   A. did the fish die, the villagers realized  

   B. did the fish die, did the villagers realize

   C. the fish died, the villagers realized

   D. the fish died, did the villagers realize

【回答】

D

知識點：倒裝與省略

題型：選擇題