One day, Alex, I and a group of other children had a game of football on {#blank#}1{#/blank#}way to school. One of the older {#blank#}2{#/blank#} pushed me and I fell over and tore (扯破) my jeans that I had to {#blank#}3{#/blank#} home to change. I arrived very late for school that day. I thought I'd get into trouble about it, but nothing {#blank#}4{#/blank#}. After class, the teacher talked about it with me and told me to be {#blank#}5{#/blank#} in the future. I asked how he knew about it. He said, "Alex told me what had happened." That afternoon I walked home with Alex and thanked him. I knew he was a true friend. 

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    Lots of scientists believe there's life on other planets．Because of this，they keep doing research about the universe．They have sent astronauts to the moon．And they have {#blank#}1{#/blank#}the answer．There's no life on the moon．Not long ago they {#blank#}2{#/blank#}spaceships to Mars．There，they didn't find life．And they found the environment of Mars was {#blank#}3{#/blank#}from that of the earth．Then they knew it was{#blank#}4{#/blank#}for people to live on Mars．

    {#blank#}5{#/blank#}they haven't received a message from other planets，they believe their idea is right．Recently they have {#blank#}6{#/blank#}a planet．It's {#blank#}7{#/blank#}Proxima Centauri．It's very {#blank#}8{#/blank#}to our earth．It is just over four light years away．Proxima Centauri is {#blank#}9{#/blank#}than the earth．And there's water on this planet．That {#blank#}10{#/blank#}mean that life is possible there．Now scientists are studying this planet．Soon they will tell people the answer．

    For example, people with type A blood are usually serious. They always have a{#blank#}1{#/blank#} and careful attitude when they deal with many things; People with type B blood are cheerful, and outgoing; People with type O blood are generous and honest; while those with type AB blood are often caring and helping. They are always willing to{#blank#}2{#/blank#} others.

    Last year, a doctor in the United States wrote a book that links blood types and what people eat. For example, his book gives some{#blank#}3{#/blank#}, like people with type O blood should eat more meat and less bread. A diet for people with type A blood includes more vegetables. His book, Eat Right for Your Type, has been a hit with people who want to lose weight. What's more, the book says eating food that{#blank#}4{#/blank#}a person's blood type can not only help them lose weight but also make them healthier.