句型转换。
1. Tom ran for an hour. (用现在完成进行时改写句子)
Tom _____ for an hour.
2. I've been dancing since I was five years old. (对划线部分提问)
_____ _____ _____ you _____ _____ ?
3. China is an old country. It has a long history. (合并为一句)
China is an old country _____ _____ _____ _____ .
4. They have used up all the money. (改为同义句)
They have_____ _____ _____ all the money.
5. Lucy has been skating for a long time. (改为一般疑问句并作否定回答)
_____ Lucy _____ _____ for a long time?
_____, she _____.
