The new trend of living a low carbon life is gradually changing people’s idea on is cool a

问题补充：

The new trend of living a low carbon life is gradually changing people’s idea on is cool and in fashion.

A. which

B. that

C. what

D. whose

答案：

A. which

B. that

(答案→)C. what

D. whose

解析：考查名词性从句。What在从句中从当主语。“低碳生活改变了人们对时尚的看法”