John went to the planet Mars for his holiday. This is his holiday.

Monday

     We arrived in the Mars City at 4:30 in the afternoon (Mars time) by a space shuttle. We went to the Mars Hotel (five stars) for dinner before going to bed. I was very tired after the journey (it takes 72 hours to get there) , but I am looking forward to my holiday very much.

Tuesday

     I didn't sleep well because of the weightlessness(), the gravity is only about three-eighths of that on Earth. I hit my head on the bedroom ceiling several times. After breakfast we spent the morning on the Mars farm. They don't use earth or chemicals to grow their food. We had lunch on the farm and then had a hoverbus ride over the Mars City. That was very exciting. In the evening we went shopping in the Mars City Shopping Mall. I bought some souvenirs for my family and my friends.

    “ Ask not what your country can do for you--ask what you can do for your country.” It's a famous quote from US president John F, Kennedy's inaugural(就职) speech in 1961.

    Mark Zuckerberg, the founder of the social networking site Facebook, must agree with Kennedy. The 33-year-old American donated $100 million to the public schools in New Jersey, US.

    Who is this young billionaire? How did he make his fortune?

    Thirteen years ago, Zuckerber was a computer geek(怪才) at Harvard University. As a second-year student, he set up a website to put the “face books” --photos of incoming first-year students online. The website, where people were able to share personal information, was a success at once.

    Zuckerberg first opened Facebook to high school students and then to everyone. Greeting such as “Have you checked your Facebook page today?” and “Do your ‘friends' know what you ate for breakfast?” became a part of American life. Now Facebook is the most popular site in the world with 1.7 billion users.” I could have never imagined all of the ways people would use Facebook when we were getting started thirteen years ago,” Zuckerberg wrote in a recent blog.

    Zuckerberg's dream is to make the Internet a more connected place. The mission(任务)could become profitable for Facebook. The more people share information about themselves online, the more money Facebook will make selting advertising. Zuckerberg is already worth $34 billion, according to Forbes.

    Yet the billionaire keeps his own life out of the public eye. At the company, it is said that he sits among a sea of desks like hundreds of workers. A visitor to Facebook might not even spot Zuckerberg in T-shirt and jeans. He usually takes one two-week vacation each year with his wife Priscilla Chan, a Chinese American. On the weekends, it is reported that he roasts pig and goat in his backyard for friends and takes Chinese lessons.

    The Social Network, a movie based on Zuckerberg's story, came out in 2010. It became one of the most popular films of that year.

    “Everything happens for the best, (一切都会变好的)" my mother said, whenever things weren't going my way. "Don't worry. One day your luck will change."

    After I had finished my college education, I discovered that Mother was right.

    I had decided to try for a job in radio. I wanted to host a sports program. I went to Chicago and knocked on the door of every station. But I got turned down every time. In one station, a kind lady said my problem was that I hadn't got enough experience. "Get some work in a small station and work your way up, "she said.

    I went back home. I couldn't get a job there, either. I felt really down. “Your luck will change, " Mom said to me. I tried another radio station in lowa. But the owner told me he had already had someone.

    As I left his office, I asked, "How can someone be a sports announcer(播音员)if he can't get a job in a radio station?" I was waiting for the lift when I heard the man call, "What did you mean? Do you know anything about football?" He put me in front of a microphone(麦克风)and asked me to try to imagine that I was giving my opinion on a football game.

    I succeeded!

    On my way home, Mom's words came back to me, "One day your luck will change, Son. And when it happens, you'll feel doubly good because of all the hard work you've done." At that moment I knew just what she meant.

    I stood in the doorway, watching my older brother carefully putting clothes into his bag. I coughed uneasily. Finally 1 that I was there, Rocky turned towards me with a sad smile.

    "I'm leaving tomorrow," he said.

    "I know." My 2 was almost a whisper (低声). I was 3 with myself for being so weak, but I wasn't about to cry.

    "My flight is early, but there is still enough time to the airport," he said. Seeing the 4 look on my face, he quickly added, "I promise I won't leave without saying goodbye."

    I tried to say 5, but I didn't. It's always 6 to keep quiet if you're about to cry. "You promised you wouldn't cry," he said to me, thinking that I was close to 7.

    I remember the day he taught me how to ride a bike. At first I thought he was always right behind me, holding the seat to keep me from 8. I was happy with this, but he knew he couldn't hold me up all my life. He told me that one day he would have to let go.

    His coughing stopped my thinking. What was left to say? How could I say goodbye to the person who taught me everything?

    The next morning I 9, looked at my alarm clock, and realized he had left hours ago. We never even said goodbye.

    Goodbye, Rocky! 10 he may have been many miles away, I knew he heard me, even if it was only an answer in his heart.