The worker only called off the strike after a new...

Câu hỏi: The worker only called off the strike after a new pay offer. 

A Not until a new pay was offered, the workers called off the strike. 

B The worker called off the strike only when a new pay offers. 

C A new pay was offered, which made the strike call off.                  

D Not until a new pay was offered did the workers call off the strike.