When you speak to foreigners, what will you do if you can't understand their languages? Will you use your body language to help you, or just say sorry to them and then go away? Learning spoken language is very important, but learning local gestures（手势） is also very necessary.

    I often use gestures to communicate with someone whose language I don't know. We use our hands to talk with each other. Although we don't understand the others' words, our hand movements make our conversation more necessary.

However, gestures aren't always clear. Different gestures may have different meanings in different countries and cultures.

    In many countries, people move their hands at someone to call him to come near. In the United States, people usually move hands at somebody with their palms（手掌） up and sometimes move just one finger. But in many countries in Asia, hand movements like that would be impolite. In Asia, many people move hands at someone with their palms down using all fingers.

    Do you use your thumb, your thick short finger to make gestures? In western countries, "thumbs-up" means agreement. But it is very rude in parts of Africa.

    If you want to say "OK" in America, you can make a circle with the thumb and the second finger. But in France, it means "zero", and it is very rude in many other countries.

    You can use your second finger to point at something but not at somebody in the United States. However, in some parts of Europe, Asia and Africa, pointing at anything with one's second finger is not polite.

    "V" form is often used when people take photos. But using two fingers to make up the "V" shape means "peace" in the West.

    The last example is that people in parts of Asia point to their noses to mean themselves, but people in western countries usually point to their chests.

    Gestures are important, but also have different meanings.

    Laughter is natural for people. We start to laugh at about four months of age. We start to laugh even 1 we start to speak.

    Laughter connects us with others. We laugh more when we are with other people. It's difficult to pretend to laugh. Laughter is 2. When people pretend to laugh, most people know it's not real.

    When do people laugh?

    Only 10 to 20 percent of laughter is about something 3. Most laughter is about being friendly with other people. Most laughter says, "I don't want to 4 with you. I want to be friendly with you." This kind of laughter brings people together.

    We often laugh when we feel nervous. In movies, there is often a joke at an exciting moment when everyone feels nervous. It is usually a(n) 5 joke, but we laugh a lot. Our laughter helps us 6.

    Why doesn't everyone laugh at the same joke?

    Not everyone has the same sense of 7. Some people think a joke is funny, but other people don't think so. People have different ideas about what is funny.

    Our idea of what is funny changes with 8. For young children, the world is new. They are interested in many things, so they laugh 9. Teenagers often laugh to protect themselves. Adults laugh at themselves and other people with similar problems. They laugh at things that give them stress. Our 10 for laughter change gradually.

In the year 2070，most of you will be more than 50 years old.The good news is that travel might become smarter by that time.To catch people's eyes and increase the numbers of passengers，European airline （航空公司）（发布）easyJet 2070：The Future Travel Report.Let's take a look at some mind—blowing ideas.

① ▲ 

Paper passport will be a thing of the past.You will use"heartbeat passport" instead.According to experts，the machine will count how many times the heart beats in a minute，then it will tell who you are.It doesn't work hard because everyone's heart beats differently.

② ▲ 

The seats on the plane are only one size，which can't make passengers satisfied.But in the future，you'll be able to book a seat according to your body type.The seat might even be able to cool or warm you if you want.There will also be no more screens on the back of the seats.A special light from the seat could show the latest movie s straight in front of your eyes.

③ ▲ 

If you like to visit great places of interest，the AR glasses will help you enjoy the journey.By wearing the AR glasses，you can see what happened at a historic place（战役）.You may even be able to sit among the cheering people at the first Olympic Games.

Are you looking forward to having those changes in the year 2070？What other changes do you think about during the flight？