The maths teacher demanded that all the students the examination paper within one and a h

问题补充：

The maths teacher demanded that all the students the examination paper within one and a half hours.

A. finish

B. finished

C. would finish

D. could finish

答案：

(答案→)A. finish

B. finished

C. would finish

D. could finish

解析：考查虚拟语气：句意：数学老师要求所有的学生在一个半小时内完成试卷。当主句的谓语动词是demand“要求”的时候，从句的谓语用虚拟语气，即“sb （should） do，这句话的从句的谓语省略should，用动词原形finish。选A。