The teacher demanded all the exercise books the next day.
A. to be handed in
B. would be handed in
C. be handed in
D. to hand in
网友回答
A. to be handed in
B. would be handed in
(答案→)C. be handed in
D. to hand in
解析：句意：老师要求所有的作业本在第二天必须交上。这里demanded后的从句需用虚拟语气should+动词原形，should可以省略，这里exercise books与hand in之间是被动关系，故选C。