GWD-1-Q41x 答案之外的疑虑

shanexwang

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

所有的答案和 as early as the eighteenth century之间是不是该有个介词 如 in? or after 18th century 加 ago?

谢谢

哇哈哈哈哈哈

as early as the eighteen centry 有点突兀放在那里，没有什么链接词吗？

kingbeckham

我也觉得，特别是正确答案was a well-established method of mineral extraction之后直接接as early as the eighteenth century读起来很不通

caizeen

我选的E，难道是时态不对吗？我觉得这正是过去的过去，用过去完成式应该恰当的啊，请教，谢谢

[此贴子已经被作者于2009-5-29 19:10:35编辑过]

AlienX

E的時態不對

E的意思是過去leaching曾經是a method of mineral extraction, 可是現在不是. 明顯的不make sense

china101

up

china101

请问b哪错了？？

msuzengli

以下是引用china101在2009-6-25 17:47:00的发言：
请问b哪错了？

establish是vt, 后面一定要有宾语.所以在这里没有was的话,要么就是过分,要么就缺少宾语并造成逻辑错误.