根据短文内容回答问题。(Answer the questions according to the passage．)

　　You Ziming, a Junior 2 student at Guangzhou No．48 Middle School, is the luckiest boy in the country．

　　The 14-year-old is the only student to have got a letter from Yang Liwei．After watching Yang go into space on October 15, You decided to write to him．A few weeks later, he got a letter and two signed(签名的)photos from Yang．

　　“I like your drawings and the card very much,”Yang wrote,“You are a clever boy．Kids like you are the hope of our country．”

　　You kept the letter secret until last week．He was not surprised to get the letter．He has known Yang for a long time．

　　“Yang is a special friend of mine,”says You．“His words have encouraged me to work hard．”

　　You became interested in space when he was aged four, and started reading about it．Three years ago he read that China was sending people into space．The news made him very excited and he decided to write a song for the astronauts．

　　A few weeks after he had sent them the song, the astronauts phoned You．They loved the song and thanked him for it．You kept in touch with them all．When Yang went into space, You decided to send him a new letter．Yang was now You's hero．

　　“Uncle Yang is a hero for me．He's done a lot for our country and I want to be a scientist like him when I grow up．”You said．

1．Why is You Ziming is called the luckiest boy in China?

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2．You has known Yang Liwei for a long time, hasn't he?

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3．What did You think of Yang Liwei's words in the letter?

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4．How old was You when he knew that China would send manned spacecraft into space?

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5．What's You Ziming's ambition now?

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