Do you know that in some parts of the world, people build temporary(暂时的)hotels made of snow and blocks(大块)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(在户外), 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.

1.According to the passage, ice hotels ______.

A. are found everywhere B. do business in summer

C. are made of glass D. are made of snow and ice

2.Which of the following about the ice hotels is true?

A. They are just like usual hotels.

B. The glasses are made of wood.

C. They serve cold drinks.

D. The rooms are made of bamboo.

3.You can’t see ______ in the ice hotels.

A. hot food B. reindeer skins

C. sleeping bag D. mattresses

4.Why are bathrooms heated in the ice hotels?

A. Guests want to eat in them.

B. Indoor temperature are very low.

C. Guests ask the hotels to do that.

D. It is as cold indoors as it is outdoors.

5.What happens to the ice hotels in spring?

A. They melt away. B. They are rebuilt.

C. They are repaired. D. They need more ice.

Many people travel to different places in the world by air. Usually it takes a long time, perhaps half a day, for passengers to stay in the plan. So airlines(航空公司)offer passengers food. But it is common that they feel bad about food taste. Do you agree?

To solve this problem, airlines try hard to improve their food. They would like to do so because they don’t want to lose customers.

However, according to scientific research, part of the reason why plane food tastes bad is that at high altitude(海拔)we can not taste things as well as we do on the ground. Also scientists have found that our noses become very dry even before a plane takes off. As the plane moves up, the change in air pressure(气压)reduces one third of the sensibility(感觉)of our taste buds(味蕾). So our taste buds become senseless. The sad face, however, is that our noses don’t know it.

All of these help explain why food on the plane tastes so bad. They also help explain why airlines choose to offer passengers salty and spicy(辛辣的)food. Without doing so, the food would be tasteless.

Now there are many researches on this. According to one of them, some volunteers are asked to lie with their feet higher than their heads for weeks. And scientists write down their feelings about food taste.

Though scientists try their best, it is not as easy as they thought. Because they can’t deal with the special environment successfully, such as the change in air pressure, making food taste good is still hard for them.

1.In Paragraph 2, “this problem” means ______.

A. passengers stay long in the plane

B. food on the plane tastes bad

C. passengers have no food to eat

D. food on the plane is expensive

2.What do airlines do to solve this problem?

A. Get more customers. B. Offer more food.

C. Improve their food. D. Reduce the ticket price.

3.As the plane moves up, the change in air pressure reduces of the sensibility of our taste buds.

A. half B. one third

C. one fourth D. one fifth

4.Why do scientists feel it hard to made food on the plane taste good?

A. The volunteers don’t know about food taste.

B. The volunteers don’t understand them.

C. They can’t find enough volunteers.

D. They can’t deal with the special environment successfully.

5.What is the best title of the passage?

A. Taste of Airplane Food

B. Airplane Travel

C. Scientific Research on Noses

D. The Change in Air Pressure

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