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听力原文： On your visit, you will see the Monument of IndependencE.Coming up on your left is the United Nations Building, our next stop. While touring the building, please stay with your guide, and please be back on the bus by two o'clock. It is important to return on timE.We will not be able to wait for latecomers. If you are left behind, you will be responsible for returning to the hotel on your own. The bus will leave at exactly two o'clock in order to arrive at our next stop, the historic City Hall building, by 2:30. We will spend three hours there enjoying the architecture and learning about the building's history. There will also be time for browsing the gift shop. We will leave City Hall at exactly 5:30 for dinner at the renowned downtown restaurant BavariA.
Who is listening to this announcement?
A.Politicians.
B.Guides.
C.Diplomats.
D.Tourists.