The small unframed painting called "Fisherman" was signed by a little-known Italian artist, Maveleone (1669-1740). When it was sold recently in New York for $ 27000, the seller, Mr. Oliver Pitt, was asked to explain how the picture had come into his possession. Pitt said, "I didn't know it was so valuable. I'm not an art expert. Photography is my hobby. I bought 'Fisherman' in Italy in 1970 for $140.the picture was dirty, and I couldn't see the artist's signature. But anyway it wasn't the picture that I like. I bought it because of the frame." "It's most unusual frame, made of tiny, silvery sea-shells. They are set in such a way that they reflect perfect light onto the surface of a picture. I now have a photograph of my wife in that frame, and I'll never part with it." "When I returned to New York I showed the painting in its frame to a customs officer. I told him that I had paid $140 for it but admitted I didn't know its actual worth. The customs man valued it at $ 140, and I was asked to pay duty on that value. I did so, there and then." "Later, I took off the frame, and that uncovered Maveleone's signature. My wife suggested in fun that the painting might be a valuable one, so I cleaned it and put it up for sale." As a result of his explanation, Oliver Pitt had to appear in court. He was accused of   knowingly making a false statement of the value of a picture so as to cheat the Customs Department. Pitt was not happy. "I told the truth as I knew it then," he said, "What else could I say?" And then the judge agreed with him. "The Customs Department is to be responsible (blame)," he said, "for making a true valuation of goods bought into the country, so that the correct amount of duty may be charged. Mr Pitt did not cause or try to cause the mistake that was made. He paid the duty that was demanded. If now, the Customs Department finds that its valuation was not correct, it cannot be allowed to have another try. Pitt is not guilty. Pitt met the customs officer    _   , where the officer was employed to    _   .
at the railway station or airport; examine people's baggage at the airport or port; examine people's baggage at the bus-stop; help people enter the USA at the airport or port; help people enter the USA
Question: The small unframed painting called "Fisherman" was signed by a little-known Italian artist, Maveleone (1669-1740). When it was sold recently in New York for $ 27000, the seller, Mr. Oliver Pitt, was asked to explain how the picture had come into his possession. Pitt said, "I didn't know it was so valuable. I'm not an art expert. Photography is my hobby. I bought 'Fisherman' in Italy in 1970 for $140.the picture was dirty, and I couldn't see the artist's signature. But anyway it wasn't the picture that I like. I bought it because of the frame." "It's most unusual frame, made of tiny, silvery sea-shells. They are set in such a way that they reflect perfect light onto the surface of a picture. I now have a photograph of my wife in that frame, and I'll never part with it." "When I returned to New York I showed the painting in its frame to a customs officer. I told him that I had paid $140 for it but admitted I didn't know its actual worth. The customs man valued it at $ 140, and I was asked to pay duty on that value. I did so, there and then." "Later, I took off the frame, and that uncovered Maveleone's signature. My wife suggested in fun that the painting might be a valuable one, so I cleaned it and put it up for sale." As a result of his explanation, Oliver Pitt had to appear in court. He was accused of   knowingly making a false statement of the value of a picture so as to cheat the Customs Department. Pitt was not happy. "I told the truth as I knew it then," he said, "What else could I say?" And then the judge agreed with him. "The Customs Department is to be responsible (blame)," he said, "for making a true valuation of goods bought into the country, so that the correct amount of duty may be charged. Mr Pitt did not cause or try to cause the mistake that was made. He paid the duty that was demanded. If now, the Customs Department finds that its valuation was not correct, it cannot be allowed to have another try. Pitt is not guilty. Pitt met the customs officer    _   , where the officer was employed to    _   .
A. at the railway station or airport; examine people's baggage
B. at the airport or port; examine people's baggage
C. at the bus-stop; help people enter the USA
D. at the airport or port; help people enter the USA
Answer: