Last month I  (21)  a

Last month I  (21)  a ticket online for a flight from Frankfurt to Lisbon. When I arrived (22)  the airport, the person at the check-in desk wanted to see the credit card that I used to purchase the ticket. I explained that somebody had stolen my card  (23)  I was in Germany, so I had a new one. This card had  (24)  name on it, but it had a different card number.

I showed the airline representative both my passport  (25)  my copy of the confirmation email. However, he  (26)  his head and said I would have to purchase  (27)  ticket if I could not show him the original credit card.

Reluctantly, I paid $ 375 for another ticket to Lisbon. When I was back in Portugal, I contacted the airline customer service by phone and, after half  (28)  hour of conversation and argument, the airline company basically said that there_ (29)  nothing they could do. I don't think I should pay twice for my airline  (30)  : Can you help me? 

填入(25)处的最佳答案是()。
A、but
B、and
C、yet
【正确答案】：B