第35题: [单项选择]When was man's life changed in many ways A. When he did. B. It is not known. C. When he learned how to make use of fire. D. With fire. 参考答案:C 答案解析:[精解] 文章细节理解题。[C]When he learned how to make use of fire,与文章中"…when he did(learned how to make use of