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题库 / Prep2008E1-SC-243
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.
an especially serious pollutant because it diminishes the respiratory system's ability to deal
an especially serious pollutant because of diminishing the respiratory system's capability of dealing
an especially serious pollutant because it diminishes the capability of the respiratory system in dealing
a specially serious pollutant because it diminishes the capability of the respiratory system to deal
a specially serious pollutant because of diminishing the respiratory system's ability to deal
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我的理解是：
C 是说 sulfur在处理其他污染物时后，削减了呼吸系统的能力。
A 是说 sulfur 降低了呼吸系统去处理其他污染物的能力
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