61. (27648-!-item-!-188;#058&003611) Researchers in Germany have unearthed 400,000-year-old wooden spears from what it appears was an ancient lakeshore hunting ground as stunning evidence of human ancestors who systematically hunted big game much earlier than believed. (A) it appears was an ancient lakeshore hunting ground as stunning evidence of human ancestors who (B) it appears had been an ancient lakeshore hunting ground and is stunning evidence that human ancestors (C) it appears to have been an ancient lakeshore hunting ground and is stunning evidence that human ancestors (D) appears to be an ancient lakeshore hunting ground, stunning evidence that human ancestors (E) appears that it is an ancient lakeshore hunting ground, stunning evidence of human ancestors who 这题选出D正确答案没问题 但我对PP的解释有点疑问： 科学家发现是对客观事实的描述，句子使用一般现在时态appears to be…句型，後面直接接相应 的名词结构即可。不需要使用完成时态。 C have been现在完成时态错误。 appear的惯用法 appear to + have pp 是正确的 OG-12-73 也有此用法 想请问PP的解释说科学家发现的客观适时描述云云..所以用完成时态错 是一个正确的说法吗？有文法依据吗？ -- Que Pasa --

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