GWD6-41 一道争议题

大胖

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.

1. when it is known that humans made
2. at which it is known that humans had made
3. at which humans are known to have made
4. that humans are known to be making
5. of humans who were known to make

GWD上的答案是A，但是今天做prep答案给的是C。  在Gmat 里不是认为主动优于被动吗？

[此贴子已经被作者于2009-4-12 22:18:33编辑过]

alohabrian

Umm...我觉得表达总有好不好之分。我不说是觉对的错。

A的when就用的不好，因为when可以被看成是adverbial clause来修是主句，而且语法上还是完全通顺的。Scientist have dated... when....

但是实际上的意图， 塑造一个 修饰结构来说明 date，这样C就是很好的结构。

大胖

以下是引用alohabrian在2009-4-12 22:10:00的发言：

Umm...我觉得表达总有好不好之分。我不说是觉对的错。

A的when就用的不好，因为when可以被看成是adverbial clause来修是主句，而且语法上还是完全通顺的。Scientist have dated... when....

但是实际上的意图， 塑造一个 修饰结构来说明 date，这样C就是很好的结构。

现在看看觉得have made 的确比 made 好。

按照alohabrian所说，那么如果看见从句里头如果用when 来修饰day ,year等时间名词是否都会引起歧义。

其次有个疑问when是否可以修饰date？如那可以，把A改成when it is known that humans have made是否就因为主动优于被动可以选A，而不选C。

[此贴子已经被作者于2009-4-12 22:35:56编辑过]

xp635

觉得A好

it is known that human...和human are known....强调的重点是不一样的

前者强调human made tool这件事,后者强调human

个人意见

 

大胖

答案应该是C,今天模拟prep的时候我选A,但是给的答案是C 。而且testmagic里都是选C,但是没有解释。

alohabrian

我觉得date还是可以用when的，但是没有at which 清楚。

另外，have made也要比made好，因为证据不能证明从什么时候开始，只能证明在date之前出现的。

至于when it is known that humans have made也不好，首先这句也一个被动句.....然后与C比又不是很简洁

[此贴子已经被作者于2009-4-12 23:18:12编辑过]

yinhang_1217

at which应该比when要好。

ggyum

这个应该是it is known that 没有human are known to 好

jy03161061

我认为C好一些,have made的描述更好