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.
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
题目释义：Sulfur dioxide, … , is…pollutant because it diminishes…ability to deal with…
考点
习惯用语（idiom） 句子结构（grammatical construction）
capability of doing/capability to do；GMAT认为capability of X-ing是wordy/awkward的。
ability：sb's ability to do sth或ability of sb/sth to do sth
capability to do/of doing/in doing不如ability to do简洁，但不可就此判错。
选项分析
A. Correct；ability to deal使用简洁；respiratory system's ability可以。
B. because of后结构复杂，awkward；capability of dealing不够简洁。
C. in dealing有做状语修饰整个从句的歧义，含义变为Sulfur dioxide在dealing with的时候减少了respiratory system的能力，而不是原义想要表达的，减少了respiratory system的deal with…的能力；Capability如果后面要加in doing,最好紧跟Capability，避免歧义。
D. especially强调严重性，specially强调特殊性，根据原义，选especially；of the respiratory system的插入，导致to deal可以修饰动词diminish，歧义。
E. especially强调严重性，specially强调特殊性，根据原义，选especially； because of错误同B。
补充说明
specially 和especially区别（记住这种小点，有益于快速解题）
Especially is most often used to emphasize something, or to say that something is more worth mentioning or more important than the other things you are talking about: It can be especially difficult for drivers to see cyclists at night. | The town is especially crowded in the summer (=much more than in winter). I hate interruptions, especially when I'm trying to work (=I do not mind as much at other times).
Specially is usually used when you do something that is different from what you usually do for a particular purpose. It is often used with the passive form of a verb: a specially made/designed/adapted etc car | I bought it specially for you
即：
especially强调严重性，specially强调特殊性！
especially是表示程度
specially表示特殊
capability和ability区别：ability to do和capability to do区别，在强调某人/物天生具有某种能力用ability好，capability可能强调的是能不能做某事（跟天生没什么关系），如government'capability或transport system's capability等。1) If we don't take great care, SARS could become established in the poorest nations - places like Burundi, Nigera or Malawi - which have neither the high-tech capability of Toronto nor the totalitarian muscle of China to contain it
2) capability of sth. to be done表一种属性, 非一种主动的能力。
3) capability (of sth.）to do/of doing.
sth's ability可用在无生命主体:
Additional evidence was provided by negative findings: drugs called adrenergic antagonists, which block peripheral adrenaline receptors, disrupted adrenaline's ability to regulate memory but did not affect memory enhancements produced by glucose that was not stimulated by adrenaline.
摘自 考gmat作者: billzhaogx 时间: 2013-2-19 07:12
