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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 ofthe respiratory system in dealing
- a specially serious pollutant because it diminishes the capability ofthe respiratory system to deal
- a specially serious pollutant because of diminishing the respiratory system’s ability to deal
答案是A,可是为什么不是C?
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