GWD 1-41 在线等待

szy733

GWD1-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.

 

1. as a method of the extraction of minerals, it was well established

2. as a method of the extraction of minerals well established

3. was a well-established method of mineral extraction

4. was a well-established method of extracting mineral that was
5. had been a method of mineral extraction, well established

题目的答案是C，我选择的是E，原因是在于对过去完成时的理解，Leaching had been a method, 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.

矿工们没有意识到...这件事情肯定是发生在Leaching 成为一种method之后，因此前后有了时间上的对比，况且从句意上讲，以A选项为基准，CD将it was well established变成了形容词well-established，会破坏原句的意思，不知道大家有什么见解，希望多多指教！

szy733

自己先顶，凑点人气！

热带鱼

    

E中的well established 这个过去分词就近修饰mineral
extraction，而非原意中的leaching.

    

Simple past描述一个过去的事实，
            as early as the eighteenth century这是一个过去时间，要用一般过去时态。作者描述俩个过去的事实，说的是两个发生时间的早晚，而非时间的先后比较，没有过去的过去。