If I have much money,I want to () my parents () a big house

b
固定的词组,offer的固定词组有：offer sb.sth.和offer sth for sb都是：提供给某人某物的意思那为什么要选B呢因为句中是my parents =sba big house=sth人在前可用词组provise......with.........或offer sb. sth.选项中只有b合适，如果是I want to ()a big house () my parents的话就选c了希望可以帮到你。