题目

If there is one thing I'm sure about, it is that in a hundred years from now we will still be reading newspapers. It is not that newspapers are a necessity. Even now some people get most of their news from television or radio. Many buy a paper only on Saturday or Sunday. But for most people, a newspaper has become a habit passed down from generation to generation.The nature of what is news may change. What basically makes news is what affects our lives-and the big political stories, the coverage of the wars, earthquakes and other disasters, will continue much the same. I think there will be mo鱼、家兔、柳树的结构和功能的基本单位是（　　）A．细胞群B．组织C．器官D．细胞