To improve people's living environment, considerably cutting car

To improve people's living environment, considerably cutting carbon emissions has become something （ ） the leadership must achieve as soon as possible.
A、which
B、that
C、of which
D、in which
【正确答案】：B
【题目解析】：考点 Mordern English Grammar -relative clauses -choice of relative pronouns and relative adverbs -relative pronouns in restrivtive relative clauses 文字解析 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。