填空题 .Few farmers in CHANGGANG, a southern Chinese village gave much thought to the swine flu epidemic that had begun spreading rapidly in the United States early this summer until police sealed its 100 residents off from the outside world for about a week. It turned out that a visitor from California had shown symptoms of the swine flu virus, or H1N1, when he arrived for a funeral.
   

填空题 1.  Why did the police seal the small village off from the outside world? ______

填空题 2.  What are the active measures taken to slow down the spread of H1N1? ______

填空题 3.  What did the most populous country do in early September to cope with swine flu? ______

填空题 4.  Why did people say those aggressive measures are contested ones? ______

填空题 5.  How could the numbers of the infected be underreported in China according to some foreign health officials? ______