Workers can’t be made for twelve hours a day.A. workB. to workC. workingD. worked

问题补充：

Workers can’t be made for twelve hours a day.

A. work

B. to work

C. working

D. worked

答案：

A. work

(答案→)B. to work

C. working

D. worked

解析：本题为被动句，被动句使役动词后的动词不用原形，而还为动词不定式to do，make

也属于此类，故选B。