The teacher commanded that the exercises in an hour.A. was finishedB. were finishedC. shou

问题补充：

The teacher commanded that the exercises in an hour.

A. was finished

B. were finished

C. should finish

D. be finished

答案：

A. was finished

B. were finished

C. should finish

(答案→)D. be finished

解析：考查虚拟语气。动词command后面的宾语从句使用虚拟语气should+动词原形；should可以省略。故D正确。