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,它后面的宾补动同不带to,而在被动语态中,需要加to。