单选题 The servant was made ______ for twenty hours every day.
【正确答案】 A
【答案解析】[精解] 本题考察被动语态中不定式的用法。被动语态中动词不定式符号to不能省略。be made to do sth．表示被迫做某事，主动语态为sb．make(s)sb．do。故正确答案为A。