题目内容：

I have a dream that we will one day live in a where we'll have a lot of trees and fresh air
A.state B.country C.nation D.space

优质解答

建议选B.
因为A和C都强调国家的主权意识.如果是国与国之间的问题,都用A或C .而B只强调地域.D 是空间,是不可数名词,不能用a来修饰.