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 _____.