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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．

A: Look! There is a red hat on the desk. Whose is it?

B: Is it Helen's?

A: No. It can't be hers. She never {#blank#}1{#/blank#} hats.

B: It might be Cindy's. She likes hats. And red is her favorite color.

A: Let's ask her. Cindy, is this your hat?

C: No. {#blank#}2{#/blank#} is at home, I don't wear it today.

A: Well, it can't be Cindy's. She says hers is at home.

B: Is it Bill's?

A: Let's ask him. Bill, is this red hat {#blank#}3{#/blank#}?

D: No, it isn't.

A: It doesn't {#blank#}4{#/blank#} to Helen, Cindy or Bill. Then whose red hat is this? Is it Eric's?

B: Oh! It must be his. I {#blank#}5{#/blank#} him wear it yesterday.

    Do you know Lam JJ? He's my{#blank#}1{#/blank#}singer. He sings really well. I know a lot about him. He's from Singapore. He is of medium{#blank#}2{#/blank#}. He is a{#blank#}3{#/blank#}tall. He has short{#blank#}4{#/blank#}hair. Sometimes he{#blank#}5{#/blank#}sunglasses. Lam JJ's birthday is in March. He can speak Chinese and English. He likes blue, black and white.