It was my first time in the US. I think there is no other country that I have heard so many things about before I visited it. Burgers, big cars, fat people, good wine and fantastic cities. For sure the real experience was quite different. Although you can find all these things there, you will also find many other things to discover.

     In Los Angeles, I stayed at a place where they even produced home-made videos. I always thought in Hollywood only movies with lots of money are produced. But in this place, even parts of the living room were functioned (运作) into a scene. But anyway, this shows what you imagined about a place before arriving might be totally wrong. Now I started to understand the city is not only the place where the big movies are made, it's also where people are crazy about movies, and always try to start a production even if they don't have lots of money. People there just really love movies, they are motivated (调动积极) to give their ideas a try and at least open up a channel online with their home-made stories.

     Of course, there are many other interesting places in Los Angeles. As I stayed only a few days, it was not enough time to see all. But I advise you to have two apps on your smart phone for traveling in America. First is Yelp to find the closest and best restaurant or coffee place. And the other is Uber because especially in Los Angeles, you won't find taxis and everything is so far. You can also drive but it's wise to park your car close to a subway station and go to Hollywood by subway.

    At midnight, Mr. King coughed again. He got up and took some medicine. Before he lay down again, he smoked. And he couldn't go to sleep any longer. He found the medicine book and began to read it. He was afraid he had lung cancer (肺癌）He seemed to see death was waiting for him. Tears ran down his face. He didn5t see his wife was standing by him.

    "What's wrong with you, dear?" asked the woman.

    "Nothing," the old man answered and covered his face with his hands.

    The old woman opened the book and understood at once. She said, "You must stop smoking right now."

    "I began to smoke when I was nine, you know. How can I do that?"

    "But I think health is more important".

    Mr. King coughed again and his wife said, "Go to see a doctor tomorrow. He will be able to help you, I think."

    The doctor told Mr. King to have an X-ray examination of his lungs. And then he looked at the X-ray carefully for a long time.

    "Tell me the truth, doctor," said Mr. King, "Do you see any shadows (阴影）in my lungs?"

    "No, I don't see anything."

    "Yes?" the old man said happily. "Really?"

    "Yes. Your lungs are turning black. How can I see any shadows?

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.

Many social media posts(社交媒体帖子) may let you believe that everyone is happy all the time, but being happy all the time is not possible.

As a teenager, you probably expected to get good grades in an exam or to win the most important basketball game, but it didn't happen. Good results make you happy and bad results make you sad. But sadness can drive you to improve yourself next time.

However, when people get into sadness for a long time and it starts to affect(影响) their lives, it's called depression (抑郁). You don't want to get out of bed. You don't feel like studýing or going out with your friends. I remember the same feeling when my dog Rebel died in an accident. I remember that he followed me to school. Now he was gone, and I lost all interests to do anything.

My parents told me dogs don't live forever. What was more, Rebel had a good life. If Ihad a good life, Rebel must be happy, too.

Depression is not a person's mistake. It's normal to feel sad sometimes. Many great people, like the comedy actor Jim Carrey, once get depressed. But you should know what to do to stop depression or make yourself less depressed.

When you feel down, you must not keep yourself away from the world. Try to share your feelings with a family member or a good friend. Staying at home by yourself will make you more lonely. You should stand up, open the window, and throw away (抛弃) the sadness.