答案:The boss made the little boy do heavy work.
解析:被动语态中带to,变成主动语态时不带to,即make sb.do sth,使某人做某事.
变化方法:
①找出被动语态中 by 后的宾语,即:the boss
将其变为 主动语态中的主语
②找出被动语态的谓语动词,即:was made to do heavy work
将其变为主动的情况,即:made to do heavy work
③找出被动语态中的主语,即:the little boy
将其变为主动语态的宾语
翻译:老板让小男孩做繁重的工作.