李大钊全面系统地介绍马克思主义的文章是(   )

古诗词阅读。
                                                                                                          登岳阳楼 

                                                                                                        【唐】杜甫
                                                                    昔闻洞庭水，今上岳阳楼。吴楚东南坼，乾坤日夜浮。
                                                                    亲朋无一字，老病有孤舟。戎马关山北，凭轩涕泗流。

Alice often _________ shopping with her mother at the weekend.       

1929～1933年的经济危机首先发生在（   ）