730GMAT真题 34

christinahong · 发表于 2003-12-22 21:36:00

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
C.at which humans are known to have made
答案：A
Why not C? be known to have done 不是习语吗？

dreadpower · 发表于 2003-12-22 22:08:00

be known to have done 这个习语有吗？？我不知道，真不好意思，请教

   以前上XDF，老师说，固定用法date  when

   我就是按这个来的

   这个题目前几天详细的讨论过，你找找看，找到帮忙跟帖把连结贴在这里好吗？万分感谢

dreadpower · 发表于 2003-12-22 22:32:00

http://forum.chasedream.com/dispbbs.aspBoardID=23&ID=29073&replyID=216994&skin=1

dreadpower · 发表于 2003-12-22 22:36:00

为什么点击找不到网页？？我就是搜索后找到的这个地址啊？？

dreadpower · 发表于 2003-12-22 22:43:00

对不起，应该是

http://forum.chasedream.com/dispbbs.asp?BoardID=23&ID=29073&replyID=216994&skin=1

yuandong · 发表于 2003-12-23 09:48:00

我觉得C的错误在于后面不该用完成时态, date就是某一天的意思,在这过去某一时刻发生的事情我看用过去时态为好,不知大家同意否?

christinahong · 发表于 2003-12-24 00:13:00

谢谢dreadpower、 yuandong GG.: )

yuandong · 发表于 2003-12-24 10:17:00

我也是后来仔细琢磨,想出这个一个理由来的,如果真的是考试现场我看不一定能够马上看出来.

730GMAT真题 34

730GMAT真题 34

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