试题题干
To improve people's living environment, considerably cutting carbon emissions has become something（）the leadership must achieve as soon as possible.
参考答案
正确答案：
试题解析
在下列词后，that常用：①all, everything, something, anything, nothing, none, little, few, much等；②被only修饰的名词、最高级形容词、序数词、普通的序数词（the next, the last）等。