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 plane. So airlines provide passengers with 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 some studies, a part of the reason why plane food tastes bad is that at a high altitude We can not taste things as well as we do on the ground. Also scientists find that our noses become very dry even before a plane takes off. As the plane moves up, the change in air pressure reduces one third of our
taste buds(味蕾).So our taste buds become senseless. The sad fact, 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 hot food. Without doing so, the food would be tasteless. Now there are many studies 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.
　　Scientists try their best, but 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) What does “this problem” means in Paragraph 2?
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. Provide more food.
C. Improve their food.D. Reduce the ticket price.
(3) What will happen when the plane moves up?
A. The change in air pressure reduces one third of our taste buds.
B. Airlines choose to eat hot food without salt.
C. Food on the plane tastes much better than that at home.
D. Passengers don’t like eating more delicious food.
(4) Why do scientists feel it hard to make 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.
(5) What is the best title of the passage?
A. Taste of Airplane FoodB. Airplane Travel
C. Scientific Research on NosesD. The Change in Air Pressure