[解析]
(1)D.细节理解题。根据文章最后一段"In 2002,the industry was worth 500 billion yuan and became an important part of China's social development"(2002年,工业产值达到5000亿元,成为中国社会发展的重要组成部分)可知,旅游业已成为中国社会发展的重要部分。故选D.
(2)A.细节理解题。根据文章第四段"When the first railways were built in the 1820s,it was easier for people to travel between towns,so they started to go for holidays by the sea"(19世纪20年代,第一条铁路建成后,人们在城镇之间旅行变得更方便了,所以他们开始去海边度假)和文章第五段"Traveling by sea also became faster and safer when the first steamships were built.People began to travel more to far﹣away countries"(当第一艘蒸汽船被制造出来时,海上旅行也变得更快更安全了。人们开始更多地到遥远的国家旅行)可知,旅游发展中交通起到最重要的作用。故选A.
(3)D.细节理解题。根据文章倒数第二段"In 1949,Russian journalist Vladimir Raitz started a company called Horizon Holidays.The company organizes everything﹣plane tickets,hotel rooms,even food﹣and tourists pay for it all before they leave home.The package tour and modern tourist industry was born"(1949年,俄罗斯记者弗拉基米尔•雷茨创办了Horizon Holidays公司。该公司组织一切﹣﹣机票、酒店房间、甚至食物﹣﹣游客在离开家之前支付所有费用。包价旅游和现代旅游业就这样诞生了)可知,现代旅游业起源于1949年。故选D.
(4)D.词义猜测题。根据文章最后一段"The first travel agency in China was set up as early as 1949."(中国第一家旅行社早在1949年就成立了)和"In 2002,the industry was 500 billion yuan and became an important part of China's social development"(2002年,产业规模达到5000亿元,成为中国社会发展的重要组成部分)可知,中国最早的旅行社是1949年成立的,且到2002年,工业产值达到5000亿元,可以猜测旅游业直到1978年才开始腾飞。故take off应该指"迅速发展"。A.plane rising into the air 升空的飞机;B.bring down the prices降低价格;C.remove hats and clothes脱掉帽子和衣服;D.develop very fast发展很快。故选D.