Why does the author write this passage?A、To explain how to become a good reader.
B、To give advice through his experience.
C、To indicate that a private library is also an interior decoration.
D、To tell readers that buying cheap books is a good way to start one’s library.
【正确答案】：B
【题目解析】：目的原因题。全文是解释如何成为好的购买者而不是A选项的内容，所以A选项不正确；全文以作者自己的经验给出建议，B选项是正确的；从最后一句可以看出C选项不对；D选项是B选项的具体化，只是其中之一，D选项不能作为题干的答案。