21. Over five thousand years ago, archaeologists have discovered that Mesopotamian cooks were preparing chicken with coriander and tamarind, just as Egyptian cooks are still doing today.
(A) Over five thousand years ago, archaeologists have discovered that
(B) Over five thousand years ago, archaeologists had discovered that
(C) Archaeologists have discovered that, over five thousand years ago,
(D) Over five thousand years ago, as archaeologists have discovered it,（C）
(E) Archaeologists have discovered, over five thousand years ago, that 偶选了b，正确是c，偶不明白：既然是在5千年以前，就应该是过去完成时呀，为什么用现在完成时。 | 
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发表于 2004-8-20 18:01:00
