题目

Kindness from a StrangerWhen I was a teenager, I travelled with my friends in Europe. One night when we arrived in Berlin, my friends were tired and stayed in the hotel while I chose to _______ this city. However, I got lost in Berlin.That night I visited many attractions around the city. When the tiredness began to set in, I checked the time on my watch. I was _______ to see that it was two o’clock in the morning! On my way to the subway station, I walked past a bakery. _______ I realized that it was my dad’s birthday. This would be the first birthday I couldn’t _______ with him becausePresident Hu's visit to Austria，______first by a Chinese president in 12 years，is regarded of _______great importance to global economic situation at present. A．a：不填              B．the；a                  C．the；不填          D．the；the