19世纪60年代在世界历史中占有重要地位,那是一个风起云涌的年代, “资本主义” 、大国腾飞和开始崛起。请阅读下列材料，回答问题。
材料一　农奴在法律上是“自由人”；地主再也不许买卖农奴和干涉他们的生活；农奴在获得“解放”时，可以得到一块份地，但他们必须出钱赎买这块份地。
材料二　1858年他发表了一篇题为《裂开的房子》的演说，他说：“一幢裂开的房子是站不住的，我相信这个政府不能永远保持半奴隶、半自由的状态。”他的演说语言生动、深入浅出，表达了北方的要求，也反映了全国人民群众的愿望，因而为他赢得了很大的声誉。1861年，他就任美国总统。
材料三　政治方面，“废藩置县”，加强中央集权；经济方面，允许土地买卖，引进西方技术，鼓励发展近代工业；社会生活方面，提倡“文明开化”，即向欧美学习，努力发展教育。

    It was Mother's Day. John was so busy with his work that he couldn't go back home. When he passed by a flower shop in the evening, an idea came to his mind. "I'll send Mum some roses."While John was picking his flowers, a young man went inside. "How many roses can I get for only five dollars, Madam?" he asked. The assistant was trying to tell him roses were as expensive as forty dollars a dozen (一打). Maybe he would be happy with carnations (康乃馨).

    "No, I have to have red roses." He said, "My mum was badly ill last year and I didn't get to spend much time with her. Now I want to get something special, it has to be roses as rose is her favorite."

After hearing it, John said he would pay the rest of the money for the young man. Moved by both of them, the assistant said," Well, lovely young men, thirty dollars a dozen, only for you." Taking the roses, the young man almost jumped into the air and ran out of the shop. It was well worth twenty-five dollars John paid to see the exciting moment. Then John paid for his dozen of roses and told the assistant to send them to his mother.

    As he walked out, he felt nice. Suddenly he saw the young man crossing the street and going into a park. But soon he realized it was not a park but a cemetery (墓地). Crying, the young man carefully laid the roses," Mum, oh, Mum, why didn't I tell you how much I loved you? God, please help me find my mum and tell her I love her."

    Seeing this, John turned and quickly walked to the shop. He would take the flowers home himself.

下列句子中的“故”字，与其它意义不同的一项是(　　)