试题题干
With polluted skies and grimy buildings, （ ） was once called "Black Country."
参考答案
正确答案：
试题解析
伯明翰之前污染严重，天空阴暗，建筑物肮脏，它被称为“黑区”。
With polluted skies and grimy buildings, （ ） was once called "Black Country."
伯明翰之前污染严重，天空阴暗，建筑物肮脏，它被称为“黑区”。