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题库 / Prep2008E2-SC-177
For the farmer who takes care to keep them cool, providing them with high-energy feed, and milking them regularly, Holstein cows are producing an average of 2,275 gallons of milk each per year.
providing them with high-energy feed, and milking them regularly, Holstein cows are producing
providing them with high-energy feed, and milked regularly, the Holstein cow produces
provided with high-energy feed, and milking them regularly, Holstein cows are producing
provided with high-energy feed, and milked regularly, the Holstein cow produces
provided with high-energy feed, and milked regularly, Holstein cows will produce
题目分析：
本题主要的难度在于看懂题意，把倒装句看清楚。要注意，平行的对象并不是take care，provide，和milk。正常的语序为：
Provided with high-energy feed, and miked regularly, Holstein cows will produce an average of 2,275 gallons of mild each per year for the farmer who takes care to keep them cool。
选项分析：
A选项：providing them with high-energy feed和milking them regularly是现在分词短语，在字面上做keep them cool的伴随状语。这在逻辑上是不对的。因为伴随状语的本质是普通的状语从句，但是“提供高能量食物”、“规律性的喂奶”、“保证奶牛们凉爽”是三个不同层面的事情，应该是并列关系，不能是互相修饰的关系。
B选项：providing them with high-energy feed是主动语态，主语必须是the farmer，但milked regularly是被动语态，主语必须是the Holstein cow，因此两者无法平行。
C选项：本选项错误在原理上和选项(B)相同，只不过是将provide部分和milk部分交换了一下。
D选项：代词them的必须指代复数名词，但本选项中的the holstein cow是单数名词，所以本选项是不正确的。。
E选项：Correct. 本选项在语法和逻辑上均是正确的。调整句子语序则有：Provided with high-energy feed, and miked regularly, Holstein cows will produce an average of 2,275 gallons of mild each per year for the farmer who takes care to keep them cool。
读题下来发现A没有硬伤，留着；BC都存在通过一个问题， and前后的成分不平行，排除BC；句子前面没有划线部分已经说了 them，那就不可能用单数，排除D；读E发现E也没有硬伤，最后在A和E中间纠结：
Ron关于A为什么错的解释有二：
第一，中间的providing...and milking...从语法上可以对，但是意义上不对，因为用Verb-ing的情况必须【同时】满足两个条件：第一 Verb-ing的主语是指前面句子的主语；第二Verb-ing是表达的要么是前面句子的结果，要么是同步发生的事件。Ron认为第一个条件满足，第二个条件不满足。我觉得解释为“同步发生的事件”是可行的，没毛病（Farmers takes care to keep..., providing...and milking...），可能是因为我理解的这个“同步发生”跟Ron说的不太一样，他说的同步，必须是极其明显的同步，比如说Tom talked to his mother on the way to school, eating the bread meanwhile.
第二，他认为从native speaker的角度来看，这个are producing的用法非常akward，原因是正在进行时的时态emphasizes the ongoing nature of an action; it specifically emphasizes that an action is taking place, right now, as we speak.。而这个句子是在表述某种状态，"to state an eternal truth. for that, the present tense is used".，用正在进行时不合适。
*Ron说还有一个小错误：note that you also can't say "THE holstein cows", unless you're referencing a particular, specific, known group of holstein cows (something that you clearly aren't doing). since you're talking about holstein cows in general, you don't use the article "the".
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