先通读下面的短文，掌握其大意，然后从A、B、C、D四个选项中选择可以填入空白处的最佳答案。
    When you talk about Chinese old capitals．which city comes to your mind?Beijing．Xi'an or Luoyang?Now,you may1Chengdu，the capital city of Sichuan Province，into that list．
    Chengdu became the tenth old capital city in China on 25th October 2016．The list did not come 2the government．Some scientists decided that it was one of the old 3at the Association(协会)of Chinese Ancient Capital Studies．Then the public 4 the fact widely．
    Chengdu started to be a capital over 2,000 years ago．It has also don a good job keeping5history．In the past 2,000 years，the city has6changed its name．It has never moved either."This is rare t(稀有的)not only in China,but across the world"said XiaoZhenghong,the president of the association．
    Xiao also7 about the places of interest in the city,Dujiangyan Panda Valley is only 37 miles city．Wolong National Nature Reserve is only 80 miles away．Chengdu Zoo is the 8 zoo in southwest of China with more than 300 kinds of animals，such as pandas and South China tigers．
    "Chengdu is an important city for sure．But9we named it one of the 10 old capitals，more tourists will10it，"said Xiao．"The title (头衔)is not for the city's past but for its future."