What is the talk mainly about？
A. Overland transportation in the nineteenm century.
B. Historical aspects of mail delivery.
C. Vehicles currently in use by the postal service.
D. The invention of the railroad.
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According to the conversation, why wont DME be on the market soon？
A. It hasn"t been adequately tested.
B. It"s expensive.
C. It damages car engines.
D. It"s dangerous to transport.
What did the woman think of the new wing of the museum？
A. She was impressed by it.
B. It was a waste of money.
C. She was amazed that it had opened so soon.
D. She didn"t like it as much as the other wings.
According to the speaker, why dont students like studying history？
A. History teachers are not patient.
B. Students are not hardworking.
C. The professors don"t make it attractive.
D. Students don"t think it important.
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