QuestionHegiavemethefirewoodin__
He giave me the firewood in ____ for the food I offer him A change B exchange C relpace D trade 说明一下理由，谢谢~~
B exchange in exchange for 固定短语， 交换, 以此易彼 A change改变变化，C relpace代替取代，D trade贸易 生意均无这样的搭配。