问题补充:
The teacher demanded that the exam before eleven.
A. must finish
B. be finished
C. would be finished
D. must be finished
答案:
A. must finish
(答案→)B. be finished
C. would be finished
D. must be finished
解析:句意:老师要求考试在11点前完成。主句中的谓语是demand的时候,宾语从句的谓语用虚拟语气,用should do,should可以省略,所以选B。