The captain urged that the mission before dark.A. must be finishedB. be finishedC. ought

问题补充：

The captain urged that the mission before dark.

A. must be finished

B. be finished

C. ought to be finished

D. was finished

答案：

A. must be finished

(答案→)B. be finished

C. ought to be finished

D. was finished

解析：本题考查虚拟语气。句中urge作“强烈要求”讲，从句用should + v原形的虚拟语气，should可以省略。根据句意选择B。