12. It's supposed to be the end of the paperback and the ________ of digital media, but some bookstores are surviving the Internet age with surprising success.
19. Whether to favor urban development or the preservation of historical sites is especially controversial in China, where there exists rich history, diversified tradition and cultural ________.
20. She said her ________ is enough to support her in later years and that her only hope is that her son can visit regularly. After all she had not much time left.