求教最新GWD-6-41

bigdreamer

 

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

答案为什么是A而不是C

端木晴

GMAT语法里面which不能用来指代时间

VicSi

晕  我也选的Ｃ

superquentin

date必跟when，时间不能用waht，which之类。有最高级（earliest）的主句之后的从句也不能用that

dori0214

以下是引用superquentin在2006-8-12 22:26:00的发言：
date必跟when，时间不能用waht，which之类。有最高级（earliest）的主句之后的从句也不能用that

尊的吗？

厄。其实我比较喜欢c a里面有两个动作，when不知道修饰哪一个

dori0214

以下是引用superquentin在2006-8-12 22:26:00的发言：
date必跟when，时间不能用waht，which之类。有最高级（earliest）的主句之后的从句也不能用that

满害人的这个话说得。。。

http://forum.chasedream.com/dispbbs.asp?boardID=22&ID=184951&page=1

missgmat

me too. C