题目

我国的四大高原是 、 、 、 。 答案：【1】青藏高原【2】黄土高原【3】内蒙古高原【4】云贵高原 －People are in great need of this kind of food． －Yes．It’s really a problem that how to _________ the needs of them． [　　] A． give B． gain C． satisfy D． produce