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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. (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——正确答案 因为spears是复数所以it无法指代。但是那为什么D选项还用appers呢？这不是单数形式吗？一开始觉得是因为what指代前面挖掘这件事所有appear用单数形式，但是不能说服自己，因为what不能指代一句话啊。请NN明示一下吧，是不是我对what从句理解错了。谢谢 | 
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发表于 2009-9-27 00:37:00
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