Many people drive their cars to school or work now. So there are lots of cars on the streets. Sometimes, it's not easy for you to get to school or work on time(准时). Then you want to take a plane to school or work. Can your dream come true? Yes!

Four people in Germany(德国) make a new plane—Lilium Jet. It doesn't look like a plane but an egg. Many people think it looks funny. The nice "egg" can take two people and "run" about three hundred kilometers an hour.

    The Lilium Jet is not very big. So it doesn't need an airport(机场). A small place is OK.

    Some people also call the Lilium Jet "a flying car". It's not difficult for you to learn to drive it. You can drive it like driving a car.

    Maybe you can buy one in 2018 if you like it. I'm sure your trip to school or work will be great.

    Deserts are found where there is little rainfall or where rain for a whole year falls in only a few weeks' time. Ten inches of rain may be enough for many plants to survive (存活) if the rain is spread throughout the year, If it falls within one or two months and the rest of the year is dry, those plants may die and a desert may form.

    Sand begins as tiny pieces of rock that get smaller and smaller as wind and weather wear them down. Sand dunes (沙丘) are formed as winds move the sand across the desert. Bit by bit, the dunes grow over the years, always moving with the winds and changing the shape. Most of them are only a few feet tall, but they can grow to be several hundred feet high.

    There is, however, much more to a desert than sand. In the deserts of the southwestern United States, cliffs (悬崖) and deep valleys were formed from thick mud that once lay beneath (在……之下) a sea more than millions of years ago. Over the centuries, the water dried up. Wind, sand, rain, heat and cold all wore away at the remaining rocks. The faces of the desert mountains are always changing--very, very slowly--as these forces of nature continue to work on the rock.

    Most deserts have a surprising variety of life. There are plants, animals and insects that have adapted (适应) to life in the desert. During the heat of the day a visitor may see very few signs of living things, but as the air begins to cool in the evening, the desert comes to life. As the sun begins to rise again in the sky, the desert once again becomes quiet and lonely.

Playing with apps on smart phones is very common among young people. Let's try some special apps and enjoy them.

Chongyang Festival {#blank#}1{#/blank#} (celebrate) on the ninth day of the ninth month on the traditional Chinese calendar, and it is also known as Double Ninth Festival.

In Chinese culture, the number nine is thought to be yang. The ninth day of the ninth month is a double yang day and "double"{#blank#}2{#/blank#} (mean) Chong in Chinese, so it got the name Chongyang Festival. The ninth month also heralds（预示）the coming of winter, so it is a time when the living need warm clothes, and some people make the festival a time for {#blank#}3{#/blank#} (provide) special clothes for their ancestors（祖先）.

During the festival, people usually {#blank#}4{#/blank#} (climb) mountains, wear the zhuyu plant, drink chrysanthemum (菊花) wine, and eat Chongyang cake. Cake in Chinese is pronounced "gao" meaning high, so people consider climbing a high mountain to be the same as eating cake. Also, people think they {#blank#}5{#/blank#} (do) better than before after eating the cake.

Double Ninth Festival is also Seniors' Day— a day to care for the elder people and to let them {#blank#}6{#/blank#} (enjoy) themselves. On the day, many communities organize retired people to go out {#blank#}7{#/blank#} (climb) mountains.

There are many colors in nature. But do you think that a color has weight? Let's do a test.

First, put two objects with the {#blank#}1{#/blank#} weight into two boxes. Then cover the boxes. Third, wrap (包裹) one box with a red piece of paper, the other with white. Now hold the boxes {#blank#}2{#/blank#} your hand one by one. Which one is {#blank#}3{#/blank#} ? It is certain that you will think the red one is heavier. Why do you think so? A scientist did many {#blank#}4{#/blank#} and found that different colors have different weights in a man's mind.

Also, scientists say that people accept the colors they like, and {#blank#}5{#/blank#} the colors they hate. So your body and mind will be {#blank#}6{#/blank#} by using the colors you like. Or you'll be nervous {#blank#}7{#/blank#} even get ill. For example, you {#blank#}8{#/blank#} blue and hate red. If you stay in a room with red windows and wallpaper for two hours, you'll feel you have been there for {#blank#}9{#/blank#} hours. But if the room is blue, you'll feel you have been there for only an hour, And, if a person walks {#blank#}10{#/blank#} of a blue room and into a red room, his temperature will rise. That means our body temperature will change with different colors.

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 confused （困惑的）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 （内耳） contain a special liquid 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're 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，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 mild motion sickness．After a week or two，the astronauts become used to it and don't feel uncomfortable anymore，a NASA flight doctor，told the BBC．