单选题 Paul doesn't have to be made ______ He is always a hard-working student.
[A] study [B] to study [C] studied [D] studying

【正确答案】 B
【答案解析】[解析] 本题考查使役动词被动语态的用法。make是使役动词，在主动语态中，它后面的宾补动词不带to，而在被动语态中，需要加to。