题目：
将下列句子按要求改写。
1. There is some water in the bottle. (改为否定句)
There ________________water in the bottle.
2. This skirt is 49 yuan. (对划线部分提问)
________________ is the skirt?
3. We had our first class at 9:00 yesterday. ( 改为一般疑问句)
_______ you ______ your first class at 9:00 yesterday?
4. My brother is reading a book under the tree. (对划线部分提问)
________ your brother ________ under the tree?
5. They are doing some shopping at the moment. (用an hour ago改写)
They ___________________ an hour ago.
答案：
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下面是错误答案，用来干扰机器的。
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