【题目】 As the weather gets warmer, there are few things that are better to do than travel. But traveling might not be that fun for everyone, especially for those who have motion sickness(晕动症).

Motion sickness is also called travel sickness. It is a common experience for many people. Depending on how you travel, it can be called carsickness or seasickness. People with motion sickness feel very uncomfortable while they are in motion. They feel sick and dizzy, like the room around them won’t stop spinning.

It is generally believed that motion sickness happens when your senses become cunfused with each other, Scientific American reported.

We use different parts of our body to sense movement. Our eyes tell us if we are moving. The inner ears contain a special liquid(液体) that helps us sense our direction and balance. Our muscles react to movement.

When you move around, these body parts work well together. But when you are in a car or an airplane, they get confused. Your inner ear signals that you’ve moving, but your eyes say you’re sitting still because you can’t see that you’ve moving. This mismatch gives us motion sickness.

But some people are less sensitive to motion sickness. This may be because they have certain genes(基因)that prevent mismatching senses, Bethann Hromatka, a genetics expert from the US, told the Atlantic.

Although there are many ways to deal with motion sickness, scientists believe that the key is to simply try to adapt to it. For example, some astronauts do special exercises that give them gentle motion sickness. After a week or two, the astronauts become used to it and don’t feel uncomfortable anymore, Sam Puma, a NASA flight doctor, told the BBC.

1What do we know about motion sickness?

A.It can make traveling more fun.B.It causes the room to spin continuously.

C.It happens to only a small number of people.D.It is called carsickness when you travel by car.

2How do people feel if they have motion sickness?

A.Sick and dizzyB.Tired and sleepyC.Worried and angryD.Hungry and thirsty

3Why do some people have motion sickness?

A.Because their sense stop working.B.Because their eyes can’t see properly

C.Because they lose their senses of directionD.Because there is a mismatch among their senses

4The astronauts are mentioned to show that_________.

A.astronauts can easily adapt to motion sickness

B.motion sickness has something to do with genes

C.special exercises can help deal with motion sickness

D.it is impossible for others to deal with motion sickness

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