A、Its free labor. B、Its free border clearance. C、Its hospitable people. D、Its low customs duty. B短文最后提到，都柏林机场成为商业区最大的优势是它具有自由清关政

If first impressions are indeed last impressions, Dublin has a reason to be confident.(19)With a spacious interior and space-age design, Dublin Airport’s Terminal 2 is the city’s calling card. At a cost of 600 million euros, T2 isn’t cheap. Some believe the airport’s rebuilding has helped change people’s impression of Dublin. Companies would want to come into a country and invest in a country with modern infrastructure facilities. What T2 has done has completely and radically catered for that.(20)The opening of T2 has been a massive attraction for next generation of foreign direct investment. The hope is that T2 will help Dublin land new business and soon the airport itself could be the site of major investment. Dublin’s airport authority owns nearly 3 000 acres of land, most of which is not in use.(21)The airport and the city hope to transform this area into a business district, specifically for clean technology companies. It would be part of a greenway—an economic corridor of green business linking the city centre with the airport. The greenway is all about jobs and economic regeneration. Dublin is trying to establish some hi-tech areas. It would expect to see the next Googles and the next Twitters coming from East Asia and setting up European Headquarter operations in and around Dublin Airport. Dublin Airport has a lot of advantages to promote this. The most important advantage is that(22)it’s the only capital city in Europe with free border clearance which can save much time when time is money. Another advantage is that the business district is extremely close to the terminal. It is just moments away from the check-in terminal and the way you go.
19. What can we learn about Dublin?
20. According to the passage, what potential benefit will Terminal 2 bring?
21. What kind of business district will Terminal 2 be transformed to?
22. What is the most important advantage of Terminal 2 being a business district?