根据所给提示，完成句型转换，每空一词，含缩略词。
(1)Tom won't visit the farm. He'll stay at home. (同义句)
Tom will stay at home ____ ____ visiting the farm.
(2)This dress cost her 100 yuan. (改为一般疑问句) 
____  this dress____  her 100 yuan?
(3)London held the first World Expo in 1851. (对划线部分提问)
____  did London____  the first World Expo?
(4)请安静，我将给大家分发试卷。（完成译句）
Be quiet, please. I'm going to____ ____  your test paper.

小李的父亲是单位的出纳会计，有一天，小李见父亲回来后心事重重，碰巧听到父亲和母亲的对话，才知道父亲在股市赔了钱，打算挪用公款以补足亏空。从案例可知，我们孝敬父母需要（  ）

2011年7月19日，西藏各族各界干部群众2万多人欢聚在布达拉宫广场，热烈庆祝西藏和平解放60周年。60年来，西藏经济社会的蓬勃发展、人民的安居乐业充分说明我国实行民族区域自治制度的优越性。下列关于民族区域自治制度的认识，正确的是（   ）
①民族区域自治制度是我国的基本民族政策，是我国的根本政治制度 
②民族区域自治是指在国家统一领导下，在少数民族地区实行区域自治 
③统一的多民族国家的长期存在和发展，是我国实行民族区域自治的历史依据 
④民族区域自治体现了我国坚持民族平等、民族团结和各民族共同繁荣的原则

根据材料内容，选择正确答案。

    Jim, a young farmer, was once put into prison (监狱).

    One day, he got a letter from his mother. "I'm so worried about our farm," she wrote. "It's time to plant potatoes. I can't dig(挖) all the fields by myself. "

    Jim read the letter and became sad. "What can I do?" he thought. Then he had a good idea. He wrote to his mother, "Don't dig the fields. There's a pot of money in the earth. Don't plant potatoes until I come home."

    Some days later, Jim got another letter from his mother. It said, "Two days ago, about ten men came to our farm and dug all our fields. I can't understand it. It looks as if they were looking for something. What shall I do?"

    Jim smiled when he read his mother's letter. He wrote a letter to his mother at once. It was very short. Guess what it would say?

定义在R上的函数f（x）满足f（2+x）=f（2﹣x），若当x∈（0，2）时，f（x）=2^x，则f（3）=____