单项选择题In the process of cloning, what ultimately activates the cell to start dividing

单项选择题From the example of two people walking along, one an economist and the other a non-economist, we can see that______.

单项选择题The author of the passage will, most probably in the future, ______.

填空题feelings

单项选择题The author’s attitude toward reading was probably influenced most strongly by the fact that______.