34. GWD25-Q16 A Harvard anthropologist has proposed that using fire to cook food could be dated back to almost two million years and that it could explain hominid features like having a large brain and small teeth. A. using fire to cook food could be dated back to almost two million years and that it could explain hominid features like having B. the use of fire to cook food could date back almost two million years and could explain such hominid features as C. cooking food with fire could date back to almost two million years, explaining hominid features like D. fire used to cook food could date back almost two million years ,explaining hominid features such as having. E. fire used for cooking food could be dated back to almost two million years and explain hominid features like.
这答题是这样的,我知道选B,但是这样想问的是关于date back的用法,A选项中date back to almost two million years这样的表达正确与否? 我怎么觉得应该在最后再加一个ago呢?求NN回答一下啦~~~~~~~~~~~~!thnx~~~~~~~~~~~~~~~~~~~
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