各路英雄请会战 GMAT 真题21 - 34

yvonne703

A

zida

More than 2,600 sharp-edged flakes, flake fragments, and cores (cobbles from which flakes have been removed), found in the fine-grained sediments of a dry riverbed in the Afar region of Ethiopia, have been dated to between 2.52 and 2.60 million years ago, pushing back by more than 150,000 years the known date at which humans were making stone tools. FROM: http://www.archaeology.org/9703/newsbriefs/tools.html

dansy

A。 TEST 21 给的答案也是A。
我觉得B和C里的完成时不对。

liynn

A

Snazzy

以下是引用zida在2003-12-28 16:44:00的发言：
More than 2,600 sharp-edged flakes, flake fragments, and cores (cobbles from which flakes have been removed), found in the fine-grained sediments of a dry riverbed in the Afar region of Ethiopia, have been dated to between 2.52 and 2.60 million years ago, pushing back by more than 150,000 years the known date at which humans were making stone tools. FROM: http://www.archaeology.org/9703/newsbriefs/tools.html

did u check out, guys? the answer is not there

dxwei2008

我认为这个地方应该选择E，原因如下：
因为这个地方牵涉到两个日期，一个日期是古人造石工具的日期，另外一个是我们知道古人造石工具的日期。这个地方明显要表达的是第一个概念，而不是第二个概念。句子的意思肯定是：把古人造石工具的日期向前推了***年；肯定不是：把我们了解古人造石工具的这个日期向前推了***年。
根据以上原因，ABCD四个答案都有分不清到底是表达哪个日期概念的嫌疑，所以只有E在这个日期概念上比较明确。

比如C：
C) at which humans are known to have made
如果改成at which humans have made就好了，这样就可以确定不是known的时间而是made的时间。

各路英雄请各抒己见！

Yuwusheng

A,
because the date refers to a period, a obscure time, not a specific day.  A is more idiomatic and neat.

zhouhaichen

从意思上来讲，选c才说得通。
a明显讲不通嘛，不应该是何时that humans made stone tools这件事被认知的，而是何时人类使用了石器。

[此贴子已经被作者于2004-1-1 19:41:09编辑过]

jetrong

我想是A，
when it is known that humans made修舌the earliest date