亚里士多德所倾向的民主政治应当由（  ）

阅读诗歌，回答问题。

                                                                                      次北固山下
                                                                                          王湾
                                                                      客路青山外，行舟绿水前。
                                                                     潮平两岸阔，风正一帆悬。
                                                                     海日生残夜，江春入旧年。
                                                                    乡书何处达？归雁洛阳边。

— ________ is your new bike?

— I ________ about 900 yuan for it.