If the south had won the war, what is now the United States _____ divided into several countries.
A. will be B. might have been
C. should be D. must have been
If the south had won the war, what is now the United States _____ divided into several countries.
A. will be B. might have been
C. should be D. must have been
D
虚拟语气，与过去事实相反用过去完成时态。