题目内容
（请给出正确答案）
[主观题]
The topic sentences may help the readers get the points of the paragraph quickly in the process paragraph.
提问人：网友baekham
发布时间：2022-01-07
如搜索结果不匹配，请 
B．Because it took so long to write one book, there were only a few of them．
C．Most people could never own a book．
D．Then sometime between 1450 and 1460, Johannes Gutenberg got the idea of carving separate letters and moving them to make new words．
E．Gutenberg died at the age of 68．
F．This was the invention of moveable typ
E．G． From then on, the numbers of books printed grew quickly．
