Cars make our lives more convenient. But theycan also be a problem. For example, fossil fuel (化石燃料)cars mainly cause air pollution.

    To improve the environment, many countriesare developing electric vehicles (EVs,电动车).Among them, China is taking a leading role and has created the world's largestEV market.

    Last year, over 40 per cent of the 753,000EVs sold in the world were sold in China, more than twice as many as the numbersold in the United States.

    "Filling up a fossil fuel car with gas(汽油) is more expensive than charging (充电) an electric car," said Wu Hao, who bought an electric carthis year.

    However, there are still some problems. Itcan be hard to find charging piles (充电桩) andthe cars can't go far before being recharged.

    Some of these problems are being solved. In2014, China had 31,000 charging piles. Now China has the world's largest EVcharging network, with more than 450,000 charging piles in total.

    Developing EVs is one of many efforts thatChina has made to cut down pressure on its environment after the governmentpromised to stop increases in carbon dioxide emissions (二氧化碳排放量) by 2030.

    "As China goes, so will the world'scar industry," the Wall Street Journal said.

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.

We rely on our memory for sharing stories with friends or learning from our past experiences. Yet evidence shows that our memory isn't as consistent as we'd like to believe.

There are countless reasons why tiny mistakes might happen each time we recall past events. And whenever these mistakes happen, they can have long-term effects on how we'll recall that memory in the future.

Take storytelling for example. When we describe our memories to other people, we might ask ourselves whether it's important to get the facts straight, or whether we only want to make the listener laugh. And we might change the story's details depending on the listener's attitudes. It isn't only the message that changes, but sometimes it's also the memory itself. This is known as the "audience-tuning effect", showing us how our memories can change automatically over time, as a product of how, when, and why we access them.

In fact, sometimes simply the act of repeating a memory can be exactly what makes it easy to change. This is known as "retrieval-enhanced suggestibility". In a typical study of this effect, participants watched a short film, then took a memory test a few days later. But during the days between watching the film and taking the final test, two other things happened. First, half of the participants took a practice memory test. Second, all of the participants were given a description of the film to read, which contained some false details. Participants who took a practice memory test shortly before reading the false information were more likely to reproduce this false information in the final memory test.

Why might this be? One theory is that repeating our memories of past events can temporarily make those memories malleable. In other words, retrieving（找回）a memory might be a bit like taking ice-cream out of the freezer and leaving it in direct sunlight for a while. By the time our memory goes back into the freezer, it might have naturally become a little misshapen, especially if someone has influenced it purposely in the meantime.

These findings lead us to wonder how much our most treasured memories have changed since the very first time we remembered them. Remembering is an act of storytelling, after all. And our memories are only ever as reliable as the most recent story we told ourselves.

A：Nice to meet you!I'm Dave from America.

B：Nice to meet you，too!I'm He Yunchen，an exchange student from China.

A：China？It's a great country. {#blank#}1{#/blank#}

B：Really？Well，next year you can come to my house for the New Year.

A：OK. {#blank#}2{#/blank#}

B：Of course not.On the New Year's Eve，we always make dumplings with family and some coins are put in the dumplings.The person with coins is lucky.

A：That's cool. {#blank#}3{#/blank#}

B：On the New Year's Day，we Chinese always visit relatives and give gifts to each other.

A：Oh，I like gifts. {#blank#}4{#/blank#}

B：In China，you shouldn't open the gift at once.You should wait and open it later.

A：Really？It's interesting. {#blank#}5{#/blank#}

B：You're welcome.

A： Tom, do you have time this Sunday evening?

B： {#blank#}1{#/blank#}

A： What about going to the movies?

B： {#blank#}2{#/blank#}I like to watch movies very much. 

A； {#blank#}3{#/blank#}

B： Well, I like cartoons because they are funny. What about you?

A： I like them, too. {#blank#}4{#/blank#}

B： Let's meet at the gate of the Peace Cinema. 

A： OK. When should we get there?

B： {#blank#}5{#/blank#}

A： Why not? See you then. 

B： See you.