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Leaching, the recovery of copper from the drainage water of mines, as a method of the extraction of minerals, it was well established as early as the eighteenth century, but until about 25 years ago miners did not realize that bacteria take an active part in the process.

正确答案: C

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发表于 2010-5-6 00:11:05 | 只看该作者 回帖奖励 |倒序浏览 |阅读模式
Q41:

Leaching, the recovery of copper from the drainage water of mines, as a method of the extraction of minerals, it was well established as early as the eighteenth century, but until about 25 years ago miners did not realize that bacteria take an active part in the process.

A.    as a method of the extraction of minerals, it was well established
B.    as a method of the extraction of minerals well established
C.    was a well-established method of mineral extraction
D.    was a well-established method of extracting mineral that was
E.    had been a method of mineral extraction, well established

答案选C
可是我觉得E更好呢。
1)通过as early as 18th century/ until 25 years ago前后对比,判断前者改用完成时。
2)另想请教“, + -ed/-ing/adj/介词短语”的结构,这种结构是就近修饰前面的名词呢,还是修饰前面的词组的核心词? 如A of B,是修饰A呢还是修饰B?
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沙发
发表于 2010-5-6 10:21:11 | 只看该作者
1)E选项中的过去完成时用得不对,因为已经出现了具体的时间as early as 18 century,所以要用一般过去式。
2)A of B结构中,A是核心。 仅在一种情况下是特例:one of sth 结构中,是就近修饰。但请楼主注意,在the one of sth 结构中,依然是修饰 the one。
                                                                    个人见解  仅供参考O(∩_∩)O~
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