根据短文内容，选择正确答案。

    A man lived in a village. He had an old cat at home. The cat couldn't run fast and bite，because she was so old. One day, when she saw a mouse, she jumped and caught it. But she could not bite it. The mouse got out of her mouth and ran away.

    Then the man became very angry and began to beat the cat. The cat said, “Don't beat your old servant. I know I'm old and can't kill a mouse. But I have worked for you for many years, and I still want to work for you. Be kind to the old, and remember what good work they did when they were young."

    When the man heard that, he realized that he was wrong.

“就在戈尔巴乔夫交出核按钮的一瞬间,聚集在电视机前的人……都知道这是那座耸立了69年的红色帝国大厦在忽然间彻底倒塌了,从此被分裂为15块碎片。”材料所反映的历史事件是（   ）

在如图中，根据平面镜成像特点画出物体AB在平面镜中的像A′B′．

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— Is Jack still live here? 

— No, he _______to London already.