Paul doesn't have to be made__．He always works hard.

Paul doesn't have to be made__．He always works hard.
A、learn
B、to learn
C、learned
D、learning
【正确答案】：B
【题目解析】：make sb．do sth．。make要求后接不带to的动词不定式，但当它用于被动语态时，则是：be made to do sth．