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 taken 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
參考答案是C
問題(1)C答案的as early as 是省略which was修飾method,但按照ETS就近修飾原則,又省略了which was極大可能是修飾mineral extraction,那到底應該是修飾哪個呢?
問題(2)D答案的that可以做限定修飾method,句意也通阿,因為A of B that,多修飾A,而且如果不省略that was可以較清楚表達as early as 是修飾method,不明白為何答案不是D較好?
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