完形填空。阅读下面短文，从短文后各题所给的A、B、C、D四个选项中，选出最佳选项。
Thanks to a combination of young businessmen, large numbers of university students and revitalization (新生) efforts by the local and national governments, today’s Nanjing has an 1 of youthful exuberance (繁茂) that would have been 2 only a few decades ago. 3 , the city, a booming city of 6.5 million on the banks of the Yangtze River some 185 miles west of Shanghai, bears 4 resemblance to the former capital of China that suffered the worst cruelty and violence of World War II.
