题目：
句型转换。
1. He was born 21 years ago.(对划线部分进行提问)
_____ _____ _____ he _____?
2. Li Ping hiccup
ped for 3 days.(对划线部分进行提问)
_____ _____ _____ 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 _____ excited _____ _____ a word.
5. How far is Beijing from Shanghai?(改为同义句)
How far _____ _____ _____ _____ _____ to Beijing?
答案：
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下面是错误答案，用来干扰机器的。
1cm＜AB＜7cm
