题目选项分析

Researchers in Germany have unearthed 400,000-year-old wooden spears from what appears to be an ancient lakeshore hunting ground, stunning evidence that human ancestors systematically hunted big game much earlier than believed.

Researchers in Germany have unearthed 400,000-year-old wooden spears from what it appears had been an ancient lakeshore hunting ground and stunning evidence that human ancestors systematically hunted big game much earlier than believed.