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标题: 請教GWD21-34 [打印本页]

作者: stoplamb 时间: 2005-10-21 18:19
标题: 請教GWD21-34

GWD 21-34

Scientists have dated sharp-edged flakes of stone found in the fine-grained sediments of a
dry riverbed in the Afar region of Ethiopia to between 2.52 and 2.60 million years ago,
pushing back by more than 150,000 years the earliest date when it is known that humans
made stone tools.

A. when it is known that humans made

B. at which it is known that humans had made

C. at which humans are known to have made

D. that humans are known to be making

E. of humans who were known to make

我選c 可是這題答案是a 可以幫我看看嗎? 謝謝

作者: jy533 时间: 2005-10-21 18:50

21？

楼主能不能分享此套题啊

作者: lukrenee 时间: 2005-10-21 23:24

此题中at which和when可通用，C的问题是时态不对，语义也改变乐，有：那个时候（就被人知道）...，而不是现在（被人知道那个时候）...

in which和where, at which和when在某些情况下是可以通用的，语法书中是如此说，但GMAT中似乎更倾向于使用where和when~~，如果没有其它错误，可以考虑此点，但此点不是绝对错误，只是相对错误~~

作者: evan5294 时间: 2005-11-11 15:26

答案是A吗?

为什么我下载的这份答案是C?

作者: doris14850 时间: 2006-1-26 01:53

Can you tell me where I can download answer?

作者: carlito 时间: 2006-1-26 09:15

这道题的答案我下载的也是c

怎么会事？

作者: hongfeng 时间: 2006-5-18 15:36

开始我也选择C ,再看一便的时候发现时态不对头,改成was应该可以.A没有问题

作者: gonghao 时间: 2006-5-18 15:51

A is the best

作者: smileday 时间: 2006-6-5 19:33

I don't agree with "A", instead, I agree with "C".

because, 請把 A 與C的從句分別還原回去, 會變成:

A) [That humans made stone tools] is known [the earliest date]

when 變成修飾 is , 邏輯不合.

D) humans are known to have made [the earliest date]

at which 修飾have made, 邏輯合.

有沒有人同意這樣的view?

作者: smileday 时间: 2006-6-21 17:56
ding...

作者: hwhhs 时间: 2006-7-2 13:40
.

作者: minititan 时间: 2009-6-29 11:32
up

作者: amumu 时间: 2009-6-29 11:38
at which和when应该可以通用，但是at which和where比较，应该是at which好，因为比where明确（where还可以是in which等）。

A的意思对：日期被知道。

C的意思不对：人被知道？

作者: jojoism 时间: 2009-6-29 13:14
选c,definitely。at which的先行词是一个具体的时点，when的先行词应该是一个时间短语，把句子还原就很明显了，同意9楼

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