Not until the fish died in the river             how serious the pollution was

1. A.
   did the villagers realize
2. B.
   the villagers realized
3. C.
   the villagers did realize
4. D.
   didn’t the villagers realize

Not until I came home last night ________ to bed.

A. Mum did go      B. did Mum go      C. went Mum       D. Mum went

Not until the child fell asleep_______leave the room.

A.did the mother                          B. does the mother

C. was the mother                         D. is the mother

Not until Dec. 2003 _____ caught by the US soldiers, and it was a great victory for the USA.

A. was Saddam Hussein  

B. Saddam Hussein was

C. had Saddam Hussein been  

D. Saddam Hussein had been

Not until about 2000 BC _______done.

A．were known of the oldest paintings     B．the oldest of known paintings were

C．the oldest known were painting              D．were the oldest known paintings