When men and women lived by hunting 50,000 years from now, how could they even begin to picture modern life? Yet to men of 50,000 years from now, we may seem as primitive (原始的) in our ideas as the Stone-Age hunters do to us. Perhaps they will spend their days golllocing to make new spunders, or struggling with their ballalators through the cribe. These words, which I have just made up, have to stand for things and ideas that we simply can't think of.
1. The text discusses men and women 50,000 years ago and 50,000 years from now in order to show that __________.
A. human history is extremely long
B. life has not changed a great deal
C. it is useless to plan for the next 50,000 years
D. it is difficult to tell what will ha