阅读理解

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What is an ice hotel? It is a hotel made of snow and ice. The walls, the furniture and the artworks are all made of ice. Builders in some cold places wait until winter to build ice hotels. They select a place near a frozen river, so they can cut ice blocks (冰块) for walls. They mix snow and ice to hold everything together and keep the blocks from coming apart. Builders finish building the outside walls first. Then they work on the inside. They carve (雕刻) furniture and works of art from blocks of ice. All this work takes time. A large ice hotel usually takes several weeks to build.

People are told to bring warm clothes because the temperature inside the hotel stays below 0℃. At night, people sleep in thick sleeping bags provided by the hotel. During the day, they sit on ice chairs. They even drink from ice glasses.

An ice hotel only stands while it is cold. Once spring comes, the hotel melts. The water returns to the river. Then builders must wait until next winter to build another ice hotel.