A
Do you know that in some parts of the world, people build temporary（暂时的）hotels made of snow and blocks of ice? These are known as ice hotels.
Unlike usual hotels , all the rooms in the ice hotels are made of ice. In some ice hotels, even the glasses for drinks are made of ice blocks. So they only serve cold drinks. Also, hot food is not served in the ice hotels, but guests can eat hot food at places nearby.
To keep warm, guests sleep in comfortable sleeping bags on ice blocks that are covered by mattresses（床垫）and reindeer skins（驯鹿皮）.
There are some places in the ice hotels that are heated, such as the bathrooms. This is because, even though it is not as cold in the ice hotels as it is outdoors, indoor temperatures are still very low.
Perhaps the most interesting thing about the ice hotels is that they are rebuilt every year. They can be used only during the winter months. The ice hotels melt（融化）away when spring arrives. The ice blocks used to build these hotels are from nearby rivers. So, when the ice hotels melt away, they melt back into the rivers.
（ ）21. According to the passage, ice hotels________ .
A. are found all year round B. are open every autumn.
C. are made of glass. D. are made of snow and ice.
（ ）22. Which of the following about the ice hotels is true?
A. They are different from usual hotels.
B. The glasses are made of snow.
C. They serve cold drinks as well as hot food.
D. Guests sleep on icy beds.
（ ）23. You can’t see________ in the ice hotels.
A.hot food B. reindeer skins C. sleeping bag D. mattresses
（ ）24. Why are bathrooms heated in the ice hotels?
A. Guests think it is not cold.
B. It is very cold in the room.
C. Guests ask the hotels to do that.
D. It is as cold indoors as it is outdoors.
（ ）25. What happens to the ice hotels in spring?
A. They have to be rebuilt. B. People build them near the river.
C. They melt away. D. They need more.
