We can never expect____bluer sky unless we create____ less polluted world.
A. a; a B. a; the
C. the; a D. the; the
We can never expect____bluer sky unless we create____ less polluted world.
A. a; a B. a; the
C. the; a D. the; the
A
sky和world原本是独一无二的,但这里前面都有了形容词修饰,表示会出现一个什么样的sky和world,这里就属于泛反指了.