Paleontologists believe that fragments of a primate jawbone unearthed in Burma and estimated at 40 to 44 million years old provide evidence of a crucial step along the OG12OG15

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Paleontologists believe that fragments of a primate jawbone unearthed in Burma and estimated at 40 to 44 million years old provide evidence of a crucial step along the evolutionary path that led to human beings.

Aat 40 to 44 million years old provide evidence of 分析该选项
Bas being 40 to 44 million years old provides evidence of 分析该选项
Cthat it is 40 to 44 million years old provides evidence of what was 分析该选项
Dto be 40 to 44 million years old provide evidence of 分析该选项
Eas 40 to 44 million years old provides evidence of what was 分析该选项

正确答案: D

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题目来源2:OG15

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难度：中等

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