TTGWD21－34

buddha0511

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

上来就选了C，结果答案是D。请问date后面只能跟when引导的定语从句吗

求助各位大侠

mioiii

if to go with "which". it'll be "...date, on which..." and the date must be an exact date.

The problem is that I don't see a problem with A?

nettrinity

不会，关注中...

fengyun1

好奇答案是什么呀！我选了E.
pushing back by more than 150,000 years the earliest date when it is known that humans made stone tools的正常语序是
pushing back the earliest date +（）+by more than 150,000 years。
看起来要给date一个限定成分，when应该不可以，B,C时态不对，D中的making好像不好，所以选E。

mbz

C is the correct answer. The original sentence is a little bit different, but pretty close.

http://forum.chasedream.com/dispbbs.asp?BoardID=23&ID=142156&replyID=&skin=0

buddha0511

原来我选对了呀，谢谢哈