句型转换。

1. He was born 21 years ago. (对画线部分进行提问) 

     _____ _____ _____ _____?

2. Li Ping hiccupped for 3 days. (对画线部分进行提问)

    _____ _____ _____ she_____?

3. I went to school when I was six years old. (改为简单句)

    I went to school _____ _____ _____ _____ six.

4. She is very excited. She can't say a word.(合为一句)

    She is _____ _____  _____ _____ a word.

5. How far is Beijing from Shanghai? (改为同义句)

    How far _____ _____ _____ _____ to Beijing?