按要求改写句子。
1.The doll is twenty-five yuan. (对画线部分提问)
_________ _________ is the doll?
2.My brother is not fat. (同义句转换)
My brother _________ _________.
3.I can play the piano. (改为一般疑问句)
_________ you _________ the piano?
4.Her nose and mouth are small. (改为否定句)
Her nose and mouth _________ _________ small.
5.My sister is tall. (改为一般疑问句)
_________ _________ sister tall?