Notuntilallthefishdiedintheriver

問題詳情：

 Not until all the fish died in the river ________ how serious the pollution was.

A．did the villagers realize

B．the villagers realized

C．the villagers did realize

D．didn't the villagers realize

【回答】

A

知識點：倒裝與省略

題型：選擇題