各路英雄请会战 GMAT 真题21 - 34

bluestone1 · 发表于 2003-12-10 12:44:00

34. Scientists have dated sharp-edges 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
B)    at which it is known that humans had made
C)    at which humans are known to have made
D)    that humans are known to be making
E)    of humans who were known to make

Snazzy · 发表于 2003-12-10 12:49:00

i prefer to B

roblixtt · 发表于 2003-12-10 12:51:00

Allen · 发表于 2003-12-10 13:17:00

ios · 发表于 2003-12-10 14:43:00

d

date's "tong wei yu"

ecsniffer · 发表于 2003-12-10 15:33:00

ios · 发表于 2003-12-10 16:23:00

oh，应该是A

lizaz · 发表于 2003-12-10 17:24:00

solome · 发表于 2003-12-10 20:47:00

yongchou · 发表于 2003-12-10 22:09:00

date at which
date when
date that----- all OK,
The key is "known to have made", as in "Neandertals are known to have made stone tools
and weapons."-------that's C , I guess

本贴相关题目 GMATPrep-2008E1-SC-256 | TN-12-SC-1 (XWHK)

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各路英雄请会战 GMAT 真题21 - 34

各路英雄请会战 GMAT 真题21 - 34

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