問題詳情
50. What is the main idea of the fifth paragraph?
(A) Large urban centers will be less polluted places to live in the future.
(B) ULEZ has already had a significant impact on air pollution in London.
(C) Zero-emissions zones are likely to replace programs such as ULEZ.
(D) London is a leader in the effort to reduce emissions in big cities.
參考答案
答案：D
統計：A:29,B:10,C:4,D:43,E:0
難度：困難