Prague, the capital of the Czech Republic, is a very beautiful city. Situated on both banks of the winding River Vltava, Prague is like one big open-air museum. 26 some six hundred years of architecture nearly untouched by natural disaster or war, the city retains much of its medieval appearance. _27_ you go, there are buildings in Romanic, Baroque, and Rococo styles that were popular hundreds of years ago. All of them successfully 28 the destruction of postwar redevelopment and remained unchanged. While the Iron Curtain was still in place under the communist government, Prague was _29_ visited by foreigners. Since the 1990s, 30 , all that has changed. Prague is now one of the most popular tourist attractions in Europe. 【題組】30. (A) afterwards (B) therefore (C) however (D) furthermore