按要求改写句子。
(1) This is a dog. (一般疑问句)
_____ _____ a dog?
(2) I’m a student. (否定句)
_____ _____ a student.
(3) John is my uncle.(对划线部分提问)
_____ _____ John?
(4) Is this a bicycle?(否定回答)
No, _____ _____.
(5) She’s my mother. (一般疑问句)
_____ she _____ mother?