Q8: Sulfur dioxide, a major contributor to acid rain, is an especially serious pollutant because it diminishes the respiratory system’s ability to deal with all other pollutants. A. an especially serious pollutant because it diminishes the respiratory system’s ability to deal B. an especially serious pollutant because of diminishing the respiratory system’s capability of dealing C. an especially serious pollutant because it diminishes the capability of the respiratory system in dealing D. a specially serious pollutant because it diminishes the capability of the respiratory system to deal E. a specially serious pollutant because of diminishing the respiratory system’s ability to deal

答案为a，我选d

看过之前的讨论，还不大明白，special和especial差别不大，至于capability to do肯定是有这种用法的；a中的sth's ability 不如ability of sth.好，所以就选d拉，请nn指教，如果有好的连接也给一下，谢谢

a good question. choice a is better than d for 2 subtle reasons:

1. "especially" has a sense of comparing things in a class, but "specially" doesn't.

2. "capability" is an overkill because it means natural ability. whatever ability is good enough.

discussions?